probiotic bacterium vs probiotic flora

probiotic bacterium and probiotic flora both are nouns.

Word	Noun	Adjective	Verb	Adverb
probiotic bacterium	Yes	No	No	No
probiotic flora	Yes	No	No	No

As nouns, probiotic bacterium and probiotic flora are synonyms defined as:

probiotic bacterium and probiotic flora: a beneficial bacterium found in the intestinal tract of healthy mammals; often considered to be a plant

Other synonyms of probiotic bacterium include probiotic, probiotic microflora.

probiotic bacterium (noun)	probiotic flora (noun)
a beneficial bacterium found in the intestinal tract of healthy mammals; often considered to be a plant	a beneficial bacterium found in the intestinal tract of healthy mammals; often considered to be a plant