embellishment vs ornament

embellishment and ornament both are nouns.

Word	Noun	Adjective	Verb	Adverb
embellishment	Yes	No	No	No
ornament	Yes	No	Yes	No

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

Other hypernyms of embellishment include decoration, ornamentation.

embellishment (noun)	ornament (noun)
the act of adding extraneous decorations to something	something used to beautify
a superfluous ornament
elaboration of an interpretation by the use of decorative (sometimes fictitious) detail

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