microorganism vs being

microorganism and being both are nouns.

Word	Noun	Adjective	Verb	Adverb
microorganism	Yes	No	No	No
being	Yes	No	No	No

As nouns, being is a hypernym of microorganism; that is, being is a word with a broader meaning than microorganism:

microorganism: any organism of microscopic size
being: a living thing that has (or can develop) the ability to act or function independently

Other hypernyms of microorganism include organism.

microorganism (noun)	being (noun)
any organism of microscopic size	a living thing that has (or can develop) the ability to act or function independently
	the state or fact of existing