bitterwood vs genus Quassia

bitterwood and genus Quassia both are nouns.

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

bitterwood (noun)	genus Quassia (noun)
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	tropical trees and shrubs with pinnate leaves and large scarlet flowers; bark is medicinal
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