hunch vs flex

hunch and flex both are nouns.

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

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

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