alteration vs revision

alteration and revision both are nouns.

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

As nouns, alteration and revision are synonyms defined as:

alteration and revision: the act of revising or altering (involving reconsideration and modification)

alteration (noun)	revision (noun)
the act of revising or altering (involving reconsideration and modification)	the act of revising or altering (involving reconsideration and modification)
the act of making something different (as e.g. the size of a garment)	something that has been written again
an event that occurs when something passes from one state or phase to another	the act of rewriting something