Orchidaceae vs orchidaceous plant

Orchidaceae and orchidaceous plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Orchidaceae	Yes	No	No	No
orchidaceous plant	Yes	No	No	No

Orchidaceae (noun)	orchidaceous plant (noun)
enormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowers	any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors