nonsense vs ornament

nonsense and ornament both are nouns.

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

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

Other hypernyms of nonsense include decoration, ornamentation.

nonsense (noun)	ornament (noun)
ornamental objects of no great value	something used to beautify
a message that seems to convey no meaning

nonsense (adjective)	ornament (adjective)
having no intelligible meaning

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