skirting board vs moulding

skirting board and moulding both are nouns.

Word	Noun	Adjective	Verb	Adverb
skirting board	Yes	No	No	No
moulding	Yes	No	No	No

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

Other hypernyms of skirting board include molding.

skirting board (noun)	moulding (noun)
a molding covering the joint formed by a wall and the floor	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