family Salicaceae vs genus Salix

family Salicaceae and genus Salix both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Salicaceae	Yes	No	No	No
genus Salix	Yes	No	No	No

family Salicaceae (noun)	genus Salix (noun)
two genera of trees or shrubs having hairy catkins: Salix; Populus	a large and widespread genus varying in size from small shrubs to large trees: willows