chlamydia vs true bacteria

chlamydia and true bacteria both are nouns.

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

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

chlamydia: coccoid rickettsia infesting birds and mammals; cause infections of eyes and lungs and genitourinary tract
true bacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of chlamydia include eubacteria, eubacterium.

chlamydia (noun)	true bacteria (noun)
coccoid rickettsia infesting birds and mammals; cause infections of eyes and lungs and genitourinary tract	a large group of bacteria having rigid cell walls; motile types have flagella
a sexually transmitted infection caused by bacteria of the genus Chlamydia