relaxation vs relax

relaxation is a noun but relax is not a noun.

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

relaxation (noun)	relax (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

relaxation (verb)	relax (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