C. diphtheriae vs Klebs-Loeffler bacillus

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

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

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

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

Other synonyms of C. diphtheriae include Corynebacterium diphtheriae.

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