Calamagrostis vs Graminaceae

Calamagrostis and Graminaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Calamagrostis	Yes	No	No	No
Graminaceae	Yes	No	No	No

As nouns, Graminaceae is a hypernym of Calamagrostis; that is, Graminaceae is a word with a broader meaning than Calamagrostis:

Calamagrostis: reed grass
Graminaceae: the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane

Calamagrostis (noun)	Graminaceae (noun)
reed grass	the grasses: chiefly herbaceous but some woody plants including cereals, bamboo, reeds, sugar cane