flex vs dent

flex and dent both are nouns.

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

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

Other hyponyms of flex include indent, incurvate, gnarl, crank, convolute, convolve.

flex (noun)	dent (noun)
the act of flexing	an impression in a surface (as made by a blow)
	an appreciable consequence (especially a lessening)
	a depression scratched or carved into a surface

flex (verb)	dent (verb)
cause (an object) to assume a crooked or angular form	make a depression into
bend a joint
form a curve
contract
exhibit the strength of