Watchin' rhymes with:
bastian, bostian, chechen, cochin, cutchin, derchin, duchin, kitchin, machin, minchin, patchin, paustian, pechin, qichen, truncheon, turchin, turchyn
Watchin' sounds like:
waitzkin, watchman, watchmen, watkin, watson, watzman, weitzen, weitzman, whitson, widdowson, witkin, woodsman, woodsmen, woodson