hyoscyamine vs alkaloid

hyoscyamine and alkaloid both are nouns.

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

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

hyoscyamine: a poisonous crystalline alkaloid (isometric with atropine but more potent); used to treat excess motility of the gastrointestinal tract
alkaloid: natural bases containing nitrogen found in plants

Other hypernyms of hyoscyamine include poison, poisonous substance, toxicant.

hyoscyamine (noun)	alkaloid (noun)
a poisonous crystalline alkaloid (isometric with atropine but more potent); used to treat excess motility of the gastrointestinal tract	natural bases containing nitrogen found in plants