streptococci vs true bacteria

streptococci and true bacteria both are nouns.

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

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

streptococci: spherical Gram-positive bacteria occurring in pairs or chains; cause e.g. scarlet fever and tonsillitis
true bacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of streptococci include eubacteria, eubacterium.

streptococci (noun)	true bacteria (noun)
spherical Gram-positive bacteria occurring in pairs or chains; cause e.g. scarlet fever and tonsillitis	a large group of bacteria having rigid cell walls; motile types have flagella