physiological vs physiology

physiological is not a noun while physiology is a noun.

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

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

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