laxation vs alteration

laxation and alteration both are nouns.

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

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

laxation: the act of making something less tight
alteration: the act of making something different (as e.g. the size of a garment)

Other hypernyms of laxation include adjustment, modification.

laxation (noun)	alteration (noun)
the act of making something less tight	the act of revising or altering (involving reconsideration and modification)
the elimination of fecal waste through the anus	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