marsh pink vs bitter floom

marsh pink and bitter floom both are nouns.

Word	Noun	Adjective	Verb	Adverb
marsh pink	Yes	No	No	No
bitter floom	Yes	No	No	No

As nouns, marsh pink and bitter floom are synonyms defined as:

marsh pink and bitter floom: any of several pink-flowered marsh plant of the eastern United States resembling a true centaury

Other synonyms of marsh pink include American centaury, rose pink, Sabbatia Angularis, Sabbatia stellaris.

marsh pink (noun)	bitter floom (noun)
any of several pink-flowered marsh plant of the eastern United States resembling a true centaury	any of several pink-flowered marsh plant of the eastern United States resembling a true centaury