sun marigold vs cape marigold

sun marigold and cape marigold both are nouns.

Word	Noun	Adjective	Verb	Adverb
sun marigold	Yes	No	No	No
cape marigold	Yes	No	No	No

As nouns, sun marigold and cape marigold are synonyms defined as:

sun marigold and cape marigold: any of several South African plants grown for the profusion of usually yellow daisylike flowers and mounds of aromatic foliage

Other synonyms of sun marigold include star of the veldt.

sun marigold (noun)	cape marigold (noun)
any of several South African plants grown for the profusion of usually yellow daisylike flowers and mounds of aromatic foliage	any of several South African plants grown for the profusion of usually yellow daisylike flowers and mounds of aromatic foliage