tubocurarine vs phytotoxin

tubocurarine and phytotoxin both are nouns.

Word	Noun	Adjective	Verb	Adverb
tubocurarine	Yes	No	No	No
phytotoxin	Yes	No	No	No

As nouns, phytotoxin is a hypernym of tubocurarine; that is, phytotoxin is a word with a broader meaning than tubocurarine:

tubocurarine: a toxic alkaloid found in certain tropical South American trees that is a powerful relaxant for striated muscles
phytotoxin: any substance produced by plants that is similar in its properties to extracellular bacterial toxin

Other hypernyms of tubocurarine include alkaloid, neuromuscular blocking agent, plant toxin.

tubocurarine (noun)	phytotoxin (noun)
a toxic alkaloid found in certain tropical South American trees that is a powerful relaxant for striated muscles	any substance produced by plants that is similar in its properties to extracellular bacterial toxin