quirk molding vs moulding

quirk molding and moulding both are nouns.

Word	Noun	Adjective	Verb	Adverb
quirk molding	Yes	No	No	No
moulding	Yes	No	No	No

As nouns, moulding is a hypernym of quirk molding; that is, moulding is a word with a broader meaning than quirk molding:

Other hypernyms of quirk molding include molding.

quirk molding (noun)	moulding (noun)
a molding having a small groove in it	a preliminary sculpture in wax or clay from which a finished work can be copied
	a decorative recessed or relieved surface on an edge
	a decorative strip used for ornamentation or finishing
	sculpture produced by molding