fold vs crease

fold and crease both are nouns.

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

As nouns, fold and crease are synonyms defined as:

Other synonyms of fold include bend, crimp, flexure, plication.

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

Other hyponyms of fold include crinkle, crumple, rumple, wrinkle.

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

fold (noun)	crease (noun)
the act of folding	a Malayan dagger with a wavy blade
a pen for sheep	a slight depression or fold in the smoothness of a surface
a folded part (as in skin or muscle)	an angular or rounded shape made by folding
a group of people who adhere to a common faith and habitually attend a given church
a group of sheep or goats
a geological process that causes a bend in a stratum of rock
an angular or rounded shape made by folding

fold (verb)	crease (verb)
incorporate a food ingredient into a mixture by repeatedly turning it over without stirring or beating	become wrinkled or crumpled or creased
become folded or folded up	make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; `crisp' is archaic
bend or lay so that one part covers the other	make wrinkled or creased
confine in a fold, like sheep	scrape gently
cease to operate or cause to cease operating