myxobacterium vs eubacterium

myxobacterium and eubacterium both are nouns.

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

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

myxobacterium: 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 myxobacterium include eubacteria, true bacteria.

myxobacterium (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