brucine vs alkaloid

brucine and alkaloid both are nouns.

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

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

brucine: a bitter alkaloid poison resembling strychnine and extracted from nux vomica
alkaloid: natural bases containing nitrogen found in plants

Other hypernyms of brucine include phytotoxin, plant toxin.

brucine (noun)	alkaloid (noun)
a bitter alkaloid poison resembling strychnine and extracted from nux vomica	natural bases containing nitrogen found in plants