stiff gentian vs ague weed

stiff gentian and ague weed both are nouns.

Word	Noun	Adjective	Verb	Adverb
stiff gentian	Yes	No	No	No
ague weed	Yes	No	No	No

As nouns, stiff gentian and ague weed are synonyms defined as:

stiff gentian and ague weed: gentian of eastern North America having clusters of bristly blue flowers

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

stiff 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