plant toxin vs toxin

plant toxin and toxin both are nouns.

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

As nouns, toxin is a hypernym of plant toxin; that is, toxin is a word with a broader meaning than plant toxin:

plant toxin: any substance produced by plants that is similar in its properties to extracellular bacterial toxin
toxin: a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species

plant toxin (noun)	toxin (noun)
any substance produced by plants that is similar in its properties to extracellular bacterial toxin	a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species