botulin vs biological weapon

botulin and biological weapon both are nouns.

Word	Noun	Adjective	Verb	Adverb
botulin	Yes	No	No	No
biological weapon	Yes	No	No	No

As nouns, biological weapon is a hypernym of botulin; that is, biological weapon is a word with a broader meaning than botulin:

botulin: potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon
biological weapon: any weapon usable in biological warfare

Other hypernyms of botulin include bioarm, bioweapon, bacterial toxin.

botulin (noun)	biological weapon (noun)
potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon	any weapon usable in biological warfare