marsh felwort vs Swertia perennia

marsh felwort and Swertia perennia both are nouns.

Word	Noun	Adjective	Verb	Adverb
marsh felwort	Yes	No	No	No
Swertia perennia	Yes	No	No	No

As nouns, marsh felwort and Swertia perennia are synonyms defined as:

marsh felwort and Swertia perennia: perennial of damp places in mountains of Eurasia and North America having dull-colored blue or violet flowers

marsh felwort (noun)	Swertia perennia (noun)
perennial of damp places in mountains of Eurasia and North America having dull-colored blue or violet flowers	perennial of damp places in mountains of Eurasia and North America having dull-colored blue or violet flowers