easing vs relaxation

easing and relaxation both are nouns.

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

As nouns, relaxation is a hyponym of easing; that is, relaxation is a word with a more specific, narrower meaning than easing:

easing (noun)	relaxation (noun)
the act of reducing something unpleasant (as pain or annoyance)	freedom from activity (work or strain or responsibility)
a change for the better	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