botulinus toxin vs botulin

botulinus toxin and botulin both are nouns.

Word	Noun	Adjective	Verb	Adverb
botulinus toxin	Yes	No	No	No
botulin	Yes	No	No	No

As nouns, botulinus toxin and botulin are synonyms defined as:

botulinus toxin and botulin: potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon

Other synonyms of botulinus toxin include botulismotoxin.

botulinus toxin (noun)	botulin (noun)
potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon	potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon