physiology vs automatic

physiology and automatic both are nouns.

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

physiology (noun)	automatic (noun)
processes and functions of an organism	self-loading rifle capable of automatic fire
the branch of the biological sciences dealing with the functioning of organisms	a pistol that will keep firing until the ammunition is gone or the trigger is released

physiology (adjective)	automatic (adjective)
	operating with minimal human intervention; independent of external control
	without volition or conscious control
	resembling the unthinking functioning of a machine