purple vs rhetorical

purple is a noun but rhetorical is not a noun.

Word	Noun	Adjective	Verb	Adverb
purple	Yes	Yes	Yes	No
rhetorical	No	Yes	No	No

purple (noun)	rhetorical (noun)
(Roman Catholic Church) official dress of a cardinal; so named after the Tyrial purple color of the robes
a color between red and blue
(in ancient Rome) position of imperial status

purple (adjective)	rhetorical (adjective)
of a color intermediate between red and blue	given to rhetoric, emphasizing style at the expense of thought
belonging to or befitting a supreme ruler	of or relating to rhetoric
excessively elaborate or showily expressed

purple (verb)	rhetorical (verb)
color purple
become purple