moulding vs decoration

moulding and decoration both are nouns.

Word	Noun	Adjective	Verb	Adverb
moulding	Yes	No	No	No
decoration	Yes	No	No	No

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

Other hypernyms of moulding include ornament, ornamentation.

moulding (noun)	decoration (noun)
a preliminary sculpture in wax or clay from which a finished work can be copied	the act of decorating something (in the hope of making it more attractive)
a decorative recessed or relieved surface on an edge	something used to beautify
a decorative strip used for ornamentation or finishing	an award for winning a championship or commemorating some other event
sculpture produced by molding