flex vs hunch

flex and hunch both are nouns.

Word	Noun	Adjective	Verb	Adverb
flex	Yes	No	Yes	No
hunch	Yes	No	Yes	No

flex (noun)	hunch (noun)
the act of flexing	the act of bending yourself into a humped position
	an impression that something might be the case

flex (verb)	hunch (verb)
cause (an object) to assume a crooked or angular form	round one's back by bending forward and drawing the shoulders forward
bend a joint
form a curve
contract
exhibit the strength of