mycoplasma vs true bacteria

mycoplasma and true bacteria both are nouns.

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

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

mycoplasma: any of a group of small parasitic bacteria that lack cell walls and can survive without oxygen; can cause pneumonia and urinary tract infection
true bacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of mycoplasma include eubacteria, eubacterium.

mycoplasma (noun)	true bacteria (noun)
any of a group of small parasitic bacteria that lack cell walls and can survive without oxygen; can cause pneumonia and urinary tract infection	a large group of bacteria having rigid cell walls; motile types have flagella