four-o'clock family vs Abronia

four-o'clock family and Abronia both are nouns.

Word	Noun	Adjective	Verb	Adverb
four-o'clock family	Yes	No	No	No
Abronia	Yes	No	No	No

four-o'clock family (noun)	Abronia (noun)
a family of flowering plants of the order Caryophyllales	genus of western North American herbs having showy flowers