Ware-house, ystordy, ystorfa
War-fare, milwriaeth: milwrio
War-like, rhyfelgar, milwrol
Warn-ing, rhybudd, rhybuddiad
War-rant, gwarant: gwarantu
War-ren, cwning-gaer
Wash-ing, golchiad; ymolchiad
Waste-book, nodlyfr, llawlyfr
Waste-ful, afradus, gwastraffus
Watch-ful, gwyliadwrus