tubocurarine vs plant toxin

tubocurarine and plant toxin both are nouns.

Word	Noun	Adjective	Verb	Adverb
tubocurarine	Yes	No	No	No
plant toxin	Yes	No	No	No

As nouns, plant toxin is a hypernym of tubocurarine; that is, plant toxin 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
plant toxin: any substance produced by plants that is similar in its properties to extracellular bacterial toxin

Other hypernyms of tubocurarine include alkaloid, neuromuscular blocking agent, phytotoxin.

tubocurarine (noun)	plant toxin (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