physiology vs relaxation

physiology and relaxation both are nouns.

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

physiology (noun)	relaxation (noun)
processes and functions of an organism	freedom from activity (work or strain or responsibility)
the branch of the biological sciences dealing with the functioning of organisms	the act of making less strict
	a method of solving simultaneous equations by guessing a solution and then reducing the errors that result by successive approximations until all the errors are less than some specified amount
	an occurrence of control or strength weakening
	a feeling of refreshing tranquility and an absence of tension or worry
	(physics) the exponential return of a system to equilibrium after a disturbance
	(physiology) the gradual lengthening of inactive muscle or muscle fibers