concentrate vs abbreviate

concentrate is a noun but abbreviate is not a noun.

Word	Noun	Adjective	Verb	Adverb
concentrate	Yes	No	Yes	No
abbreviate	No	No	Yes	No

As verbs, abbreviate is a hypernym of concentrate; that is, abbreviate is a word with a broader meaning than concentrate:

Other hypernyms of concentrate include abridge, contract, cut, foreshorten, reduce, shorten.

concentrate (noun)	abbreviate (noun)
a concentrated example of something
a concentrated form of a foodstuff; the bulk is reduced by removing water
the desired mineral that is left after impurities have been removed from mined ore

concentrate (verb)	abbreviate (verb)
cook until very little liquid is left	shorten
make denser, stronger, or purer	reduce in scope while retaining essential elements
make central
be cooked until very little liquid is left
make more concise
compress or concentrate
direct one's attention on something
draw together or meet in one common center