physiology vs physiological

physiology is a noun but physiological is not a noun.

Word	Noun	Adjective	Verb	Adverb
physiology	Yes	No	No	No
physiological	No	Yes	No	No

physiology (noun)	physiological (noun)
processes and functions of an organism
the branch of the biological sciences dealing with the functioning of organisms

physiology (adjective)	physiological (adjective)
	of or relating to the biological study of physiology
	of or consistent with an organism's normal functioning