acute vs chronic

acute is a noun but chronic is not a noun.

Word	Noun	Adjective	Verb	Adverb
acute	Yes	Yes	No	No
chronic	No	Yes	No	No

acute (noun)	chronic (noun)
a mark placed above a vowel to indicate pronunciation

acute (adjective)	chronic (adjective)
having or experiencing a rapid onset and short but severe course	being long-lasting and recurrent or characterized by long suffering
of an angle; less than 90 degrees	persisting for a long time
of critical importance and consequence	habitual
having or demonstrating ability to recognize or draw fine distinctions
ending in a sharp point
extremely sharp or severe