flexure vs pucker

flexure and pucker both are nouns.

Word	Noun	Adjective	Verb	Adverb
flexure	Yes	No	No	No
pucker	Yes	No	Yes	No

As nouns, pucker is a hyponym of flexure; that is, pucker is a word with a more specific, narrower meaning than flexure:

Other hyponyms of flexure include plait, pleat, kink, twirl, twist, ruck, accordion fold, concertina fold, z-fold, zig-zag fold.

flexure (noun)	pucker (noun)
act of bending a joint; especially a joint between the bones of a limb so that the angle between them is decreased	an irregular fold in an otherwise even surface (as in cloth)
an angular or rounded shape made by folding
the state of being flexed (as of a joint)

flexure (verb)	pucker (verb)
	to gather something into small wrinkles or folds
	draw together into folds or puckers
	become wrinkled or drawn together