common marigold vs Scotch marigold

common marigold and Scotch marigold both are nouns.

Word	Noun	Adjective	Verb	Adverb
common marigold	Yes	No	No	No
Scotch marigold	Yes	No	No	No

As nouns, common marigold and Scotch marigold are synonyms defined as:

common marigold and Scotch marigold: the common European annual marigold

Other synonyms of common marigold include Calendula officinalis, pot marigold, ruddles.

common marigold (noun)	Scotch marigold (noun)
the common European annual marigold	the common European annual marigold