concentrate vs plunge

concentrate and plunge both are nouns.

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

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

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

concentrate (noun)	plunge (noun)
a concentrated example of something	a brief swim in water
a concentrated form of a foodstuff; the bulk is reduced by removing water	a steep and rapid fall
the desired mineral that is left after impurities have been removed from mined ore

concentrate (verb)	plunge (verb)
cook until very little liquid is left	begin with vigor
make denser, stronger, or purer	devote (oneself) fully to
make central	cause to be immersed
be cooked until very little liquid is left	immerse briefly into a liquid so as to wet, coat, or saturate
make more concise	thrust or throw into
compress or concentrate	fall abruptly
direct one's attention on something	drop steeply
draw together or meet in one common center	dash violently or with great speed or impetuosity