concentrate vs hear

concentrate is a noun but hear is not a noun.

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

As verbs, hear is a hyponym of concentrate; that is, hear is a word with a more specific, narrower meaning than concentrate:

Other hyponyms of concentrate include absorb, engross, engulf, immerse, plunge, soak up, steep, recall, think, zoom in, listen, take heed.

concentrate (noun)	hear (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)	hear (verb)
cook until very little liquid is left	get to know or become aware of, usually accidentally
make denser, stronger, or purer	perceive (sound) via the auditory sense
make central	receive a communication from someone
be cooked until very little liquid is left	listen and pay attention
make more concise	examine or hear (evidence or a case) by judicial process
compress or concentrate
direct one's attention on something
draw together or meet in one common center