organism vs organismal

organism is a noun but organismal is not a noun.

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

organism (noun)	organismal (noun)
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

organism (adjective)	organismal (adjective)
	of or relating to or belonging to an organism (considered as a whole)