Open English Wordnet
Nouns
(n)change, alteration, modificationan event that occurs when something passes from one state or phase to another“the change was intended to increase sales”, “this storm is certainly a change for the worse”, “the neighborhood had undergone few modifications since his last visit years ago”
(n)alteration, modification, adjustmentthe act of making something different (as e.g. the size of a garment)
(n)revision, alterationthe act of revising or altering (involving reconsideration and modification)“it would require a drastic revision of his opinion”