myxobacter vs myxobacterium

myxobacter and myxobacterium both are nouns.

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

As nouns, myxobacter and myxobacterium are synonyms defined as:

myxobacter and myxobacterium: bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste

Other synonyms of myxobacter include gliding bacteria, myxobacteria, slime bacteria.

myxobacter (noun)	myxobacterium (noun)
bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste	bacteria that form colonies in self-produced slime; inhabit moist soils or decaying plant matter or animal waste