ague weed vs five-flowered gentian

ague weed and five-flowered gentian both are nouns.

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

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

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

Other synonyms of ague weed include agueweed, Gentiana quinquefolia, Gentianella quinquefolia, stiff gentian.

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