ergonovine vs alkaloid

ergonovine and alkaloid both are nouns.

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

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

ergonovine: an alkaloid derived from ergot (trade name Ergotrate Maleate) that is less toxic than ergot; induces muscular contraction of the uterus and is administered after childbirth or abortion
alkaloid: natural bases containing nitrogen found in plants

ergonovine (noun)	alkaloid (noun)
an alkaloid derived from ergot (trade name Ergotrate Maleate) that is less toxic than ergot; induces muscular contraction of the uterus and is administered after childbirth or abortion	natural bases containing nitrogen found in plants