nitric bacteria vs eubacteria

nitric bacteria and eubacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
nitric bacteria	Yes	No	No	No
eubacteria	Yes	No	No	No

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

nitric bacteria: soil bacteria that convert nitrites to nitrates
eubacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of nitric bacteria include eubacterium, true bacteria.

nitric bacteria (noun)	eubacteria (noun)
soil bacteria that convert nitrites to nitrates	a large group of bacteria having rigid cell walls; motile types have flagella