enterobacteria vs eubacterium

enterobacteria and eubacterium both are nouns.

Word	Noun	Adjective	Verb	Adverb
enterobacteria	Yes	No	No	No
eubacterium	Yes	No	No	No

As nouns, eubacterium is a hypernym of enterobacteria; that is, eubacterium is a word with a broader meaning than enterobacteria:

enterobacteria: rod-shaped Gram-negative bacteria; most occur normally or pathogenically in intestines of humans and other animals
eubacterium: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of enterobacteria include eubacteria, true bacteria.

enterobacteria (noun)	eubacterium (noun)
rod-shaped Gram-negative bacteria; most occur normally or pathogenically in intestines of humans and other animals	a large group of bacteria having rigid cell walls; motile types have flagella