pucker vs scrunch up

pucker is a noun but scrunch up is not a noun.

Word	Noun	Adjective	Verb	Adverb
pucker	Yes	No	Yes	No
scrunch up	No	No	Yes	No

As verbs, scrunch up is a hypernym of pucker; that is, scrunch up is a word with a broader meaning than pucker:

pucker: to gather something into small wrinkles or folds
scrunch up: make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic

Other hypernyms of pucker include crease, crinkle, crisp, ruckle, scrunch, wrinkle.

As verbs, scrunch up is a hypernym of pucker; that is, scrunch up is a word with a broader meaning than pucker:

pucker: become wrinkled or drawn together
scrunch up: make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic

Other hypernyms of pucker include crease, crinkle, crisp, ruckle, scrunch, wrinkle.

pucker (noun)	scrunch up (noun)
an irregular fold in an otherwise even surface (as in cloth)

pucker (verb)	scrunch up (verb)
to gather something into small wrinkles or folds	make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
draw together into folds or puckers	sit on one's heels
become wrinkled or drawn together