ruck vs crease

ruck and crease both are nouns.

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

As nouns, crease is a hypernym of ruck; that is, crease is a word with a broader meaning than ruck:

Other hypernyms of ruck include bend, crimp, flexure, fold, plication.

As verbs, crease is a hypernym of ruck; that is, crease is a word with a broader meaning than ruck:

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

Other hypernyms of ruck include crinkle, crisp, ruckle, scrunch, scrunch up, wrinkle.

ruck (noun)	crease (noun)
a crowd especially of ordinary or undistinguished persons or things	a Malayan dagger with a wavy blade
an irregular fold in an otherwise even surface (as in cloth)	a slight depression or fold in the smoothness of a surface
	an angular or rounded shape made by folding

ruck (verb)	crease (verb)
become wrinkled or drawn together	become wrinkled or crumpled or creased
	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