ornamental vs ornament

ornamental and ornament both are nouns.

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

ornamental (noun)	ornament (noun)
any plant grown for its beauty or ornamental value	something used to beautify

ornamental (adjective)	ornament (adjective)
serving an esthetic rather than a useful purpose

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