crease vs ruck up

crease is a noun but ruck up is not a noun.

Word	Noun	Adjective	Verb	Adverb
crease	Yes	No	Yes	No
ruck up	No	No	Yes	No

As verbs, ruck up is a hyponym of crease; that is, ruck up is a word with a more specific, narrower meaning than crease:

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

Other hyponyms of crease include cockle, crumple, knit, pucker, rumple, pucker, ruck.

crease (noun)	ruck up (noun)
a Malayan dagger with a wavy blade
a slight depression or fold in the smoothness of a surface
an angular or rounded shape made by folding

crease (verb)	ruck up (verb)
become wrinkled or crumpled or creased	become wrinkled or drawn together
make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
make wrinkled or creased
scrape gently