archaebacteria vs archaeobacteria

archaebacteria and archaeobacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
archaebacteria	Yes	No	No	No
archaeobacteria	Yes	No	No	No

As nouns, archaebacteria and archaeobacteria are synonyms defined as:

archaebacteria and archaeobacteria: considered ancient life forms that evolved separately from bacteria and blue-green algae

Other synonyms of archaebacteria include archaebacterium, archeobacteria.

archaebacteria (noun)	archaeobacteria (noun)
considered ancient life forms that evolved separately from bacteria and blue-green algae	considered ancient life forms that evolved separately from bacteria and blue-green algae