five-flowered gentian vs ague weed

five-flowered gentian and ague weed both are nouns.

Word	Noun	Adjective	Verb	Adverb
five-flowered gentian	Yes	No	No	No
ague weed	Yes	No	No	No

As nouns, five-flowered gentian and ague weed are synonyms defined as:

five-flowered gentian and ague weed: gentian of eastern North America having clusters of bristly blue flowers

Other synonyms of five-flowered gentian include agueweed, Gentiana quinquefolia, Gentianella quinquefolia, stiff gentian.

five-flowered gentian (noun)	ague weed (noun)
gentian of eastern North America having clusters of bristly blue flowers	gentian of eastern North America having clusters of bristly blue flowers