Klebs-Loeffler bacillus vs C. diphtheriae

Klebs-Loeffler bacillus and C. diphtheriae both are nouns.

Word	Noun	Adjective	Verb	Adverb
Klebs-Loeffler bacillus	Yes	No	No	No
C. diphtheriae	Yes	No	No	No

As nouns, Klebs-Loeffler bacillus and C. diphtheriae are synonyms defined as:

Klebs-Loeffler bacillus and C. diphtheriae: a species of bacterium that causes diphtheria

Other synonyms of Klebs-Loeffler bacillus include Corynebacterium diphtheriae.

Klebs-Loeffler bacillus (noun)	C. diphtheriae (noun)
a species of bacterium that causes diphtheria	a species of bacterium that causes diphtheria