Center letter: p Outer letter: a g i n r w Answers (45): warping wrapping apian aping gaping gawp gawping grappa grip griping gripping napping nipping pagan paging pain paining pair pairing pang panini panning papa papaw paring pawing pawn pawning pawpaw pigging ping pinging pining pinning piping pippin prawn prig rapini rapping riparian ripping warp wiping wrap