agueweed vs gentian

agueweed and gentian both are nouns.

Word	Noun	Adjective	Verb	Adverb
agueweed	Yes	No	No	No
gentian	Yes	No	No	No

As nouns, gentian is a hypernym of agueweed; that is, gentian is a word with a broader meaning than agueweed:

agueweed: gentian of eastern North America having clusters of bristly blue flowers
gentian: any of various plants of the family Gentianaceae especially the genera Gentiana and Gentianella and Gentianopsis

agueweed (noun)	gentian (noun)
gentian of eastern North America having clusters of bristly blue flowers	any of various plants of the family Gentianaceae especially the genera Gentiana and Gentianella and Gentianopsis
perennial herb of southeastern United States having white-rayed flower heads; formerly used as in folk medicine