listeria vs eubacteria

listeria and eubacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
listeria	Yes	No	No	No
eubacteria	Yes	No	No	No

As nouns, eubacteria is a hypernym of listeria; that is, eubacteria is a word with a broader meaning than listeria:

listeria: any species of the genus Listeria
eubacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of listeria include eubacterium, true bacteria.

listeria (noun)	eubacteria (noun)
any species of the genus Listeria	a large group of bacteria having rigid cell walls; motile types have flagella