nonsense vs ornamentation

nonsense and ornamentation both are nouns.

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

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

Other hypernyms of nonsense include decoration, ornament.

nonsense (noun)	ornamentation (noun)
ornamental objects of no great value	the act of adding extraneous decorations to something
a message that seems to convey no meaning	something used to beautify
	the state of being ornamented

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