The term 'CHANGED SIDES' can be defined by two crossword solutions: DEFECTED (8 letters) and SWUNGOVER (9 letters). DEFECTED is a term used to describe when someone leaves a political party, organization, or cause and joins the opposition. Swungover is a term used to describe when someone changes their opinion on an issue or topic. Both terms imply that someone has changed their allegiance or opinion from one side to another.