phytotoxin vs mycotoxin

phytotoxin and mycotoxin both are nouns.

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

As nouns, mycotoxin is a hyponym of phytotoxin; that is, mycotoxin is a word with a more specific, narrower meaning than phytotoxin:

phytotoxin: any substance produced by plants that is similar in its properties to extracellular bacterial toxin
mycotoxin: a toxin produced by a fungus

Other hyponyms of phytotoxin include nicotine, strychnine, brucine, hemlock, curare, tubocurarine.

phytotoxin (noun)	mycotoxin (noun)
any substance produced by plants that is similar in its properties to extracellular bacterial toxin	a toxin produced by a fungus