body part vs organism

body part and organism both are nouns.

Word	Noun	Adjective	Verb	Adverb
body part	Yes	No	No	No
organism	Yes	No	No	No

body part (noun)	organism (noun)
any part of an organism such as an organ or extremity	a living thing that has (or can develop) the ability to act or function independently
	a system considered analogous in structure or function to a living body