stiff gentian vs five-flowered gentian

stiff gentian and five-flowered gentian both are nouns.

Word	Noun	Adjective	Verb	Adverb
stiff gentian	Yes	No	No	No
five-flowered gentian	Yes	No	No	No

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

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

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

stiff gentian (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