botulinum vs true bacteria

botulinum and true bacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
botulinum	Yes	No	No	No
true bacteria	Yes	No	No	No

As nouns, true bacteria is a hypernym of botulinum; that is, true bacteria is a word with a broader meaning than botulinum:

botulinum: anaerobic bacterium producing botulin the toxin that causes botulism
true bacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of botulinum include eubacteria, eubacterium.

botulinum (noun)	true bacteria (noun)
anaerobic bacterium producing botulin the toxin that causes botulism	a large group of bacteria having rigid cell walls; motile types have flagella