being vs organism

being and organism both are nouns.

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

As nouns, being and organism are synonyms defined as:

being and organism: a living thing that has (or can develop) the ability to act or function independently

being (noun)	organism (noun)
a living thing that has (or can develop) the ability to act or function independently	a living thing that has (or can develop) the ability to act or function independently
the state or fact of existing	a system considered analogous in structure or function to a living body