family Orchidaceae vs genus Oncidium

family Orchidaceae and genus Oncidium both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Orchidaceae	Yes	No	No	No
genus Oncidium	Yes	No	No	No

family Orchidaceae (noun)	genus Oncidium (noun)
enormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowers	large genus of showy epiphytic or lithophytic or terrestrial orchids of tropical and subtropical America