rauwolfia vs alkaloid

rauwolfia and alkaloid both are nouns.

Word	Noun	Adjective	Verb	Adverb
rauwolfia	Yes	No	No	No
alkaloid	Yes	No	No	No

As nouns, alkaloid is a hypernym of rauwolfia; that is, alkaloid is a word with a broader meaning than rauwolfia:

rauwolfia: any of several alkaloids extracted from the shrub Rauwolfia serpentina
alkaloid: natural bases containing nitrogen found in plants

rauwolfia (noun)	alkaloid (noun)
any shrub or small tree of the genus Rauwolfia having leaves in whorls and cymose flowers; yield substances used medicinally especially as emetics or purgatives or antihypertensives	natural bases containing nitrogen found in plants
any of several alkaloids extracted from the shrub Rauwolfia serpentina