gild the lily vs ornament

gild the lily is not a noun while ornament is a noun.

Word	Noun	Adjective	Verb	Adverb
gild the lily	No	No	Yes	No
ornament	Yes	No	Yes	No

As verbs, ornament is a hypernym of gild the lily; that is, ornament is a word with a broader meaning than gild the lily:

Other hypernyms of gild the lily include adorn, beautify, decorate, embellish, grace.

gild the lily (noun)	ornament (noun)
	something used to beautify

gild the lily (verb)	ornament (verb)
make unnecessary additions to what is already complete	make more attractive by adding ornament, colour, etc.
adorn unnecessarily (something that is already beautiful)	be an ornament to