easing vs alteration

easing and alteration both are nouns.

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

As nouns, alteration is a hypernym of easing; that is, alteration is a word with a broader meaning than easing:

easing: a change for the better
alteration: an event that occurs when something passes from one state or phase to another

Other hypernyms of easing include change, modification.

easing (noun)	alteration (noun)
the act of reducing something unpleasant (as pain or annoyance)	the act of revising or altering (involving reconsideration and modification)
a change for the better	the act of making something different (as e.g. the size of a garment)
	an event that occurs when something passes from one state or phase to another