1 syllable:
aue, bao, blau, blauw, blough, bough, bow, brau, brough, brow, cao, cau, chao, chiao, chow, ciao, clough, cow, crough, dao, daopao, dow, dowe, drough, fao, frau, gnau, gow, grau, graue, hao, hau, hmpao, how, howe, hsiao, jwoww, kao, kau, klaue, kough, lao, lau, lmmfao, lough, mao, pao, pfau, plough, plow, pough, pow, powe, prough, prow, rao, rau, sao, schlau, schlough, schow, scow, shao, shough, shrow, skow, sough, sow, sprow, strau, strough, tao, thao, thau, thou, tpe wau, tsao, vdpau, vow, wow, xiao, yao, yow, zhao, zschau

2 syllables:
aarau, al-fao, allow, and how, ant cow, arau, aschgrau, avow, bacau, bandow, bilbao, bow-wow, bowwow, brandow, breastplough, cabiao, cacau, cahow, carwow, cash cow, cat chow, changdao, cheng xiao, chingtao, chow chow, cibao, cocao, dadao, depauw, dessau, devow, endow, eyebrow, feldgrau, fernao, filyaw, first cow, foclmao, fuyao, guandao, hausfrau, highbrow, hofbrau, i-thou, jarchow, jungfrau, kapow, know-how, kowtow, kuntao, lanao, landau, latiao, lessnau, liao, lichtblau, ling-pao, locao, luau, lubao, macao, macau, maicao, mandaue, maomao, margao, mcdow, mcgough, meow, miaodao, mike howe, milch cow, milk cow, monschau, mouth bow, nandao, nanzhao, ndau, neelghau, nylghau, ogowe, outbow, pathao, pegao, pingyao, podao, pow-wow, powwow, pudao, purewow, qiao, qingdao, qipao, rizhao, roflmao, rotflmao, rotglmao, sadao, safflow, sea cow, serowe, sestao, shen-pao, shimao, shitao, shou-lao, simao, snowplough, snowplow, somehow, sorkow, sound bow, taobao, tian tao, tien-pao, todd-ao, tsingtao, tumbao, turnbough, unbow, unnao, warehou, wodao, wow-wow, xinyao, yarbough, youdao

3 syllables:
ahegao, amy chow, andrew howe, anyhow, apayao, atyrau, bajaao, barbakow, bella ciao, cabuyao, cacajao, cainiao, carabao, cedeao, changpeng zhao, conceicao, curaao, curacao, dairy cow, dazibao, disallow, disavow, disavow', ehefrau, eigengrau, gong lijiao, goodenough, guilinggao, he bingjiao, hongyipao, huang zitao, huludao, humacao, ifugao, initao, jiandao, kabeljauw, krakatao, liang chow, lister plough, lister plow, liuyedao, mahilyow, maranhao, miagao, middlebrow, mindanao, morgenthau, overcrow, pathet-lao, puppy chow, qinhuangdao, recurve bow, rowdydow, sacred cow, schering-plough, shaohao, shi tingmao, sillyhow, siopao, springing cow, take a bow, tamarao, tongliao, toutiao, wikihow, xiantiandao, xiaolongbao, yanmaodao, yaorenmao, yiguandao, youtiao, zhanmadao, zhenniao

4 syllables:
anhalt-dessau, charlotte nicdao, john allen chau, kitaotao, lmfao, maguindanao, manny pacquiao, marianao, martin landau, maschinenbau, violin bow

5 syllables:
athletic bilbao, caniapiscau, coco de macao, holier-than-thou