allow, avow, Bilbao, Bissau, bough, bow, bow-wow, brow, cacao, chow, ciao, cow, dhow, Dow, endow, Foochow, Frau, Hangzhou, Hough, how, Howe, kowtow, Lao, Liao, Macao, miaow, Mindanao, mow, now, ow, Palau, plough (US plow), pow, prow, row, scow, Slough, sough, sow, Tao, thou, vow, wow, Yangshao