mock orange vs genus Philadelphus

mock orange and genus Philadelphus both are nouns.

Word	Noun	Adjective	Verb	Adverb
mock orange	Yes	No	No	No
genus Philadelphus	Yes	No	No	No

mock orange (noun)	genus Philadelphus (noun)
large hardy shrub with showy and strongly fragrant creamy-white flowers in short terminal racemes	mock orange: type and sole genus of the subfamily Philadelphaceae; sometimes placed in family Saxifragaceae
small shrubby deciduous yellowwood tree of south central United States having spines, glossy dark green leaves and an inedible fruit that resembles an orange; its hard orange-colored wood used for bows by Native Americans; frequently planted as boundary hedge
shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit
small flowering evergreen tree of southern United States