10 letters · 10 points in Scrabble
noun an event that occurs when something passes from one state or phase to another
noun the act of making something different (as e.g. the size of a garment)
noun the act of revising or altering (involving reconsideration and modification)
originFrom Old French alteracion (French altération), from Medieval Latin alterātiō. Morphologically alter + -ation.
Etymology from Wiktionary, CC BY-SA 3.0