In a fashion article I was editing today, the writer had said that a hairpiece metamorphosizes an entire ensemble.
I stared at it for a long time try to figure out why it seemed both right and wrong. In the end, all I figured out is that it's wrong -- at least, according to Webster's New World and Dictionary.com, anyway.
Both dictionaries say the verb form of metamorphosis is metamorphose. No "ize."
Though it sure seems I hear a lot of people "ize" that word. I bet I've done it myself.