genus Simarouba vs bitterwood

genus Simarouba and bitterwood both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Simarouba	Yes	No	No	No
bitterwood	Yes	No	No	No

genus Simarouba (noun)	bitterwood (noun)
type genus of Simaroubaceae; tropical American trees and shrubs having a pale soft wood and bitter bark	handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark
	West Indian tree yielding the drug Jamaica quassia
	medium to large tree of tropical North and South America having odd-pinnate leaves and long panicles of small pale yellow flowers followed by scarlet fruits