genus Combretum vs bush willow

genus Combretum and bush willow both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Combretum	Yes	No	No	No
bush willow	Yes	No	No	No

genus Combretum (noun)	bush willow (noun)
type genus of the Combretaceae: tropical and subtropical small shrubs and trees	small deciduous tree of the Transvaal having spikes of yellow flowers
	small South African tree having creamy yellow fragrant flowers usually growing on stream banks