preform vs mould

preform is not a noun while mould is a noun.

Word	Noun	Adjective	Verb	Adverb
preform	No	No	Yes	No
mould	Yes	No	Yes	No

As verbs, mould is a hypernym of preform; that is, mould is a word with a broader meaning than preform:

Other hypernyms of preform include forge, form, mold, shape, work.

As verbs, mould is a hypernym of preform; that is, mould is a word with a broader meaning than preform:

Other hypernyms of preform include forge, form, mold, shape, work.

preform (noun)	mould (noun)
	container into which liquid is poured to create a given shape when it hardens
	sculpture produced by molding
	a distinctive nature, character, or type
	a dish or dessert that is formed in or on a mold
	a fungus that produces a superficial growth on various kinds of damp or decaying organic matter
	the process of becoming mildewed
	the distinctive form in which a thing is made
	loose soil rich in organic matter

preform (verb)	mould (verb)
form or shape beforehand or determine the shape of beforehand	become moldy; spoil due to humidity
form into a shape resembling the final, desired one	shape or influence; give direction to
	fit tightly, follow the contours of
	form by pouring (e.g., wax or hot metal) into a cast or mold
	make something, usually for a specific function
	form in clay, wax, etc