myxobacteria vs true bacteria

myxobacteria and true bacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
myxobacteria	Yes	No	No	No
true bacteria	Yes	No	No	No

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

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

Other hypernyms of myxobacteria include eubacteria, eubacterium.

myxobacteria (noun)	true bacteria (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