meadow bright vs marsh marigold

meadow bright and marsh marigold both are nouns.

Word	Noun	Adjective	Verb	Adverb
meadow bright	Yes	No	No	No
marsh marigold	Yes	No	No	No

As nouns, meadow bright and marsh marigold are synonyms defined as:

meadow bright and marsh marigold: swamp plant of Europe and North America having bright yellow flowers resembling buttercups

Other synonyms of meadow bright include Caltha palustris, cowslip, kingcup, May blob, water dragon.

meadow bright (noun)	marsh marigold (noun)
swamp plant of Europe and North America having bright yellow flowers resembling buttercups	swamp plant of Europe and North America having bright yellow flowers resembling buttercups