sex activity vs crease

sex activity and crease both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex activity	Yes	No	No	No
crease	Yes	No	Yes	No

sex activity (noun)	crease (noun)
activities associated with sexual intercourse	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

sex activity (verb)	crease (verb)
	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