Travelled rhymes with:
traveled, raveled, traveled, unraveled, raveled, traveled, unraveled, bedeviled, bevelled, disheveled, evald, hoyvald, leveled, levelled, marveled, raveled, reveled, rivaled, shoveled, shriveled, swiveled, traveled, unraveled, unrivaled
Travelled sounds like:
thorvald, threefold, travelday, traveled, travolta, trebled, tripled, triplet, triplett, triviality, troubled, trueblood