or/or...

A,an/the
http://www.engleskijezik.com/2013/12/nekoliko-pravila-za-upotrebu-clanova/
http://engleski-jezik.com/vrste-rijeci/clan.htm
http://www.mogi.co.rs/engleski-jezik-osnove/odredjen-neodredjen-clan/
a/an sa izuzecima: http://abc.amarilisonline.com/neodredeni-clan-u-engleskom-jeziku-a-an/
omission of articles:
http://www.englishpractice.com/improve/omission-articles-cases-articles/
http://www.englishgrammar.org/omission-articles/

Another vs. Other vs. Others
{Izuzetci: the other uz jedninu ako je specific noun.......another - before number or before phrases such as acouple of, few etc.}
{any other i no other - moze i jednina i mnozina zavisno sta hocemo da kazemo}
Another/other: http://www.englishcurrent.com/grammar/other-another-difference/
Another/other/others: http://www.grammar.cl/english/another-other-others.htm
Any other:
 http://www.pearsonlongman.com/ae/azar/grammar_ex/message_board/archive/articles/00029.htm
No other:
https://www.collinsdictionary.com/dictionary/english/no-other
Another/some other {some other prikladnije kad se govori o stvarima razlicite vrste}:
https://www.quora.com/What-are-the-differences-between-some-other-and-another

As/Like - kao
http://dictionary.cambridge.org/es/gramatica/gramatica-britanica/as-or-like

Prepositions: at, in, on:
http://www.talkenglish.com/grammar/prepositions-on-at-in.aspx
Mesto: https://www.englishclub.com/grammar/prepositions-place-at-in-on.htm
Vreme: https://www.englishclub.com/grammar/prepositions-at-in-on-time.htm,
http://www.5minuteenglish.com/mar18.htm

Because, since or as - http://dictionary.cambridge.org/grammar/british-grammar/as-because-or-since

By myself vs myself (= yourself, itself, ourselves, themselves)
http://english.stackexchange.com/questions/100221/i-did-it-by-myself-vs-i-did-it-myself

to be + Considered / considered as/ considered to be 
{izbegavati considered as; bolje je reci regard as ili deem}
https://www.quora.com/Which-is-correct-considered-as-rude-considered-to-be-rude-or-considered-rude

come across / run into / bump into / encounter
https://forum.wordreference.com/threads/come-across-run-into.1613066/
https://www.italki.com/question/357412
https://english.stackexchange.com/questions/57447/difference-between-run-into-come-upon-and-come-across
{come across - uglavnom za stvari (ali moze i za ljude)..........run into - za ljude i zivotinje}

- come across:
1) to meet someone, or to find something by chance
2) come across (as): if someone or something comes across in a particular way, you have a particular opinion of them when you meet them or see them; to give other people a certain feeling or opinion
https://www.macmillandictionary.com/dictionary/british/come-across
https://dictionary.cambridge.org/dictionary/english/come-across
https://idioms.thefreedictionary.com/come+across

- run into:
1) to meet someone you know when you are not expecting to
2) If you run into trouble, problems or difficulties, you unexpectedly begin to experience them.
3) If a vehicle runs into something, it accidentally hits it.
https://www.collinsdictionary.com/dictionary/english/run-into
https://dictionary.cambridge.org/dictionary/english/run-into-sb
https://www.macmillandictionary.com/dictionary/british/run-into
https://idioms.thefreedictionary.com/run+into

- bump into:
1) to meet someone you know when you have not planned to meet them
https://dictionary.cambridge.org/dictionary/english/bump-into-sb
https://www.collinsdictionary.com/dictionary/english/bump-into
2) To touch or strike something or someone
https://idioms.thefreedictionary.com/bump+into
https://www.macmillandictionary.com/dictionary/british/bump-into

- encounter:
1) Unexpectedly be faced with or experience (something hostile or difficult); If you encounter problems or difficulties, you experience them.
2) Meet (someone) unexpectedly.
https://en.oxforddictionaries.com/definition/encounter
https://dictionary.cambridge.org/dictionary/english/encounter
https://www.collinsdictionary.com/dictionary/english/encounter

come at / come in {kad necega ima puno pa dolaze po razlicitim...}
- at: different experience levels, price points, prices
-  in: (all, many, several, a few, a variety of) shapes, styles, sizes, colors, materials, price ranges

easier or more easily
http://www.whichenglish.com/Better-English-Grammar/usage/easier-or-more-easily.html

Except / except for
https://dictionary.cambridge.org/grammar/british-grammar/except-or-except-for

Excess vs. Excessive
{Excess means "more than is necessary" whereas excessive means "too much."}
https://painintheenglish.com/case/3233
https://www.englishforums.com/English/ExcessiveVsExcess/bbknjw/post.htm
https://dictionary.cambridge.org/dictionary/english/excess
https://dictionary.cambridge.org/dictionary/english/excessive

Gain, obtain, acquire 

Gain
- Uz misaone imenice:
access
advantage(s)
confidence
control
entry, entrance
experience
freedom
independence
insight
knowledge
loyalty
nothing
popularity
privilege
reputation
respect, respectability
skill(s)
success
support
time
trust
wisdom
- Increase the amount or rate of something, typically: weight (some weight, a lot of weight, a little weight, a few pounds) or speed   (moze i: power, strength)

Obtain:
- neki predmet: books, documents, blood, map, ticket, copy, medicine, passport
- license, certificate; estimates, results; data, information; permission; money, funding, wealth, insurance; divorce
- misaone imenice: knowledge, consent (saglasnost), advice, approval, satisfaction, influence, idea
* obtained by: e.g. Sugar is obtained by crushing and processing sugar cane.

Acquire:
- Stvari, imovina: books, jacket, food, friends;  properties, assets (imovina), wealth, fortune, capital
- Misaone imenice: reputation, skill(s), knowledge, habit(s), ability, taste, resistance

If or whether? - indirect questions
{whether svuda moze}.....{if se cesce govri ali ne moze u 3 slucaja: after prepositions (about, in, itd.), before to-infinitives, i nemoze if or not (jedino moze if pa nesto pa onda or not)}
*if i whether obicno idu sa or, ali ne moraju
http://dictionary.cambridge.org/us/grammar/british-grammar/if-or-whether

In/into

http://dictionary.cambridge.org/us/grammar/british-grammar/in-into

Into .. in to: http://writingexplained.org/into-vs-in-to-difference

[isto vazi za on/onto: http://dictionary.cambridge.org/us/grammar/british-grammar/on-onto]

Less or fewer
http://dictionary.cambridge.org/grammar/british-grammar/less-or-fewer
http://www.oxforddictionaries.com/words/less-or-fewer

Left/Remain
{In everyday English, people usually say that something is left rather than remains.}
- Left
(e.g. I’ve only got a few dollars left. He's got plenty of money left. We don’t have much time left.....There were a couple of seats left at the back. ......be left: He pointed to what was left of the house. All that was left was a pile of bones. He was left in feeble health. Is there any gin left? Is there any coffee left? There won't be anything left for future generations. In each case, contestants are voted out one at a time by their colleagues and by viewers until just two are left.............They still have six games left to play.)
https://www.collinsdictionary.com/dictionary/english/left
https://www.ldoceonline.com/dictionary/be-left
- Remain
(e.g. Only a few ruins remain. Only a few hundred of these animals remain today. Little remained after the fire.  Only two minutes still remain in the game. After the flood, nothing remained of the village. In all other aspects, the scheme remains the same...........remain + pridev: He remained silent. It remains a secret. The bank will remain open while renovations are carried out. We have to invest in new technology if we are to remain competitive..........remain + prilog (t/in/with etc) She was too ill to remain at home. The refugees were allowed to remain in the UK.............remain + to be: A great many things remain to be done. It remains to be seen. Several points remain to be settled...........remaining na kraju recenice posle nekog broja: The score is tied, with fifteen minutes remaining.)
https://www.ldoceonline.com/dictionary/remain
https://dictionary.cambridge.org/dictionary/english/remain?topic=staying-and-remaining
https://www.merriam-webster.com/dictionary/remain
https://www.macmillandictionary.com/dictionary/british/remain

Likely/Probably
{be (is,will,was) + likely + to/that}, {likely + that/to}, {samo likely}
* {most likely, more likely, not likely, highly likely, very likely, more than likely, increasingly likely, quite likely}
https://en.oxforddictionaries.com/definition/likely

Love/Like
Love (Cambridge): http://dictionary.cambridge.org/dictionary/english/love
Like (Cambridge): http://dictionary.cambridge.org/es/gramatica/gramatica-britanica/like
*Hate, like, love and prefer (with ing form or with a to): http://dictionary.cambridge.org/es/gramatica/gramatica-britanica/hate-like-love-and-prefer


Made from, made of, made out of, made with
http://dictionary.cambridge.org/grammar/british-grammar/word-order-and-focus/made-from-made-of-made-out-of-made-with

May/Might (+have):
http://www.grammar.cl/english/may-might.htm
http://www.englishgrammarsecrets.com/maymight/menu.php
https://learnenglish.britishcouncil.org/en/english-grammar/verbs/modal-verbs/may-might-may-have-and-might-have

Much, many, a lot of (lots of)
http://dictionary.cambridge.org/grammar/british-grammar/much-many-a-lot-of-lots-of-quantifiers

No / None/ None of / Neither of { no directly before nouns bilo brojive ili nebrojive..........neither of - dve stvari ... none of - vise stvari
* Neither of i none of: before the, zamenice (my, your,...)......a samo za none of + demonstratives (this, that)
http://dictionary.cambridge.org/grammar/british-grammar/quantifiers/no-none-and-none-of

Nositi: wear/carry/bear
https://www.blogger.com/blogger.g?blogID=1880856856912926363&pli=1#editor/target=post;postID=3010323051343201008

Particular / Certain:
http://dictionary.cambridge.org/dictionary/english/particular odredjen (= specific)
http://dictionary.cambridge.org/dictionary/english/certain neodredjen, neki' izvesni
http://english.stackexchange.com/questions/252054/difference-between-certain-specific-and-particular

Particularly / In particular:
Particularly ide uz pridev ili glagol; In particular ide zasebno, obicno na kraju ili pocetku recenice
http://www.englishlessonsbrighton.co.uk/how-to-choose-between-in-particular-and-particularly/
https://www.englishforums.com/English/InParticularParticularly/zgmbr/post.htm

People /person/ persons
{2,3,4 people, not persons......one person}
https://dictionary.cambridge.org/grammar/british-grammar/person-persons-or-people

Popular with vs Popular among
https://english.stackexchange.com/questions/60924/popular-with-vs-popular-among
https://forum.wordreference.com/threads/popular-among-or-with.3294902/

Practice vs. practise
http://www.grammar-monster.com/easily_confused/practice_practise.htm
http://www.world-english.org/practise_practice.htm
http://grammarist.com/spelling/practice-practise/

Practice/do/play/work out/take sport or exercise or activity
https://www.italki.com/question/244743

Prefer to/over/rather than  (kad ima izbor izmedju dve stvari)
{Amerikancima najbolje zvuci to, redje koriste rather than, a over im zvuci neobicno ali nije gramaticki nepravilno} {to moze izmedju dve imenice ili dva glagola u gerundu}
to i rather than: https://dictionary.cambridge.org/grammar/british-grammar/common-verbs/prefer
to i over: https://jakubmarian.com/prefer-to-or-prefer-over-which-preposition/
sva tri: https://english.stackexchange.com/questions/1752/which-is-correct-prefer-x-to-y-or-prefer-x-over-y

Raise/rise
{raise sa objektom, a rise bez objekta}
https://dictionary.cambridge.org/grammar/british-grammar/raise-or-rise

Regardless of / No matter / Regardless
{Posle Regardless of ide imenica, .....posle No matter obicno ide what, where, how, why}
http://www.stickyball.net/writing/330.html

Solve/resolve {Solve concerns logical problems ... Resolve typically concerns emotional problems}:
http://www.englishlessonsbrighton.co.uk/whats-the-difference-between-solve-and-resolve/

Some / any
http://abc.amarilisonline.com/some-any-u-engleskom-jeziku-upotreba-vezbanja-kombinacije-i-slozenice/
https://www.ego4u.com/en/cram-up/vocabulary/some-any

Suitable/Convenient
http://www.oxforddictionaries.com/definition/english/suitable
http://www.oxforddictionaries.com/definition/english/convenient

That or Which
http://www.oxforddictionaries.com/words/that-or-which

This/that   these/those
https://learnenglish.britishcouncil.org/en/english-grammar/pronouns/that-these-and-those

under / below / beneath / underneath
http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/1535_questionanswer/page35.shtml
https://english.eagetutor.com/english-grammar/spoken-english-grammar/difference-between-under-below-beneath-and-underneath
https://www.englishgrammar.org/beneath/

Worry about / concern
{worried about = concerned about = care about}  {It concerns me.........I worry about it}
http://dictionary.cambridge.org/dictionary/english/worry
http://dictionary.cambridge.org/dictionary/english/concern

Your/(of) yours, their/theirs,...
http://english.stackexchange.com/questions/22289/difference-between-yours-and-your
https://www.italki.com/question/193705
http://dictionary.cambridge.org/grammar/british-grammar/pronouns-possessive-my-mine-your-yours-etc
Yours in sentence: http://sentence.yourdictionary.com/yours