slime bacteria vs eubacterium

slime bacteria and eubacterium both are nouns.

Word	Noun	Adjective	Verb	Adverb
slime bacteria	Yes	No	No	No
eubacterium	Yes	No	No	No

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

slime bacteria: bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste
eubacterium: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of slime bacteria include eubacteria, true bacteria.

slime bacteria (noun)	eubacterium (noun)
bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste	a large group of bacteria having rigid cell walls; motile types have flagella