relax vs relaxation

relax is not a noun while relaxation is a noun.

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

relax (noun)	relaxation (noun)
	freedom from activity (work or strain or responsibility)
	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

relax (verb)	relaxation (verb)
become less tense, rest, or take one's ease
cause to feel relaxed
make less taut
become loose or looser or less tight
make less active or fast
become less severe or strict
make less severe or strict
become less tense, less formal, or less restrained, and assume a friendlier manner