wall hanging vs ornament

wall hanging and ornament both are nouns.

Word	Noun	Adjective	Verb	Adverb
wall hanging	Yes	No	No	No
ornament	Yes	No	Yes	No

As nouns, ornament is a hypernym of wall hanging; that is, ornament is a word with a broader meaning than wall hanging:

wall hanging: decoration that is hung (as a tapestry) on a wall or over a window
ornament: something used to beautify

Other hypernyms of wall hanging include decoration, ornamentation.

wall hanging (noun)	ornament (noun)
decoration that is hung (as a tapestry) on a wall or over a window	something used to beautify

wall hanging (verb)	ornament (verb)
	make more attractive by adding ornament, colour, etc.
	be an ornament to