clostridia vs clostridium

clostridia and clostridium both are nouns.

Word	Noun	Adjective	Verb	Adverb
clostridia	Yes	No	No	No
clostridium	Yes	No	No	No

As nouns, clostridia and clostridium are synonyms defined as:

clostridia and clostridium: spindle-shaped bacterial cell especially one swollen at the center by an endospore

clostridia (noun)	clostridium (noun)
spindle-shaped bacterial cell especially one swollen at the center by an endospore	spindle-shaped bacterial cell especially one swollen at the center by an endospore