Siu rhymes with:
athanassiou, wasiyu, antoniou, athanassiou, demetriou, dezeeuw, wasiyu, abiquiu, abu, accu, agematsu, agnew, alu, andreu, andrew, antoniou, antoniu, aouzou, argue, arvizu, athanassiou, ave, ayscue, ballew, bantu, bartoo, basu, bayanjou, bayou, belew, belue, bienvenu, bilyeu, brochu, buckalew, buckelew, bucklew, bundschuh, burlew, caluzu, cantu, carew, ceaucescu, ceausescu, cefalu, chalifoux, chesebrough, chubu, compu, continue, corlew, curcuru, curfew, daihatsu, danju, declue, deleeuw, demetriou, dentsu, deroo, dezeeuw, discontinue, donaghue, donehoo, donoghue, dragoo, dunahoo, economou, ecru, edu, eigenvalue, elihu, erburu, escue, eskew, espiritu, etsu, fayanjuu, flerfu, florescue, fujitsu, ginsu, gisu, giurescu, gladu, grandnephew, gvaryahu, haiku, hajdu, hanshew, harju, haskew, haydu, hebrew, hetu, holzschuh, honolulu, honshu, huairou, igloo, immu, impromptu, ingenue, iosue, issue, isuzu, jiangsu, juju, kadrescu, kakadu, kakumaru, kamakau, kanemaru, kankaku, karibu, keanu, keiretsu, kennebrew, killebrew, kinnebrew, kismayu, kofu, kudzu, kwazulu, kyushu, lahue, landrieu, larew, lebleu, leffew, lehew, lerew, loew, loewe, luu, maheu, majrooh, malibu, manchu, mangosuthu, marilu, maruyu, marylou, masakazu, masaru, mashalu, massieu, mathew, mathieu, matthew, matzu, mayhew, mengistu, menu, merithew, merrihew, mikidu, minchew, minoru, minshew, mishoe, mitsuru, mongosutu, morphew, mugu, muldrew, mulgrew, negu, nephew, nikou, ninsu, noboru, norimatsu, o'donoghue, o'donohue, oahu, odonoghue, odonohue, okwu, onto, osamu, ouagadougou, outokumpu, overvalue, pannu, pelekunu, pelleu, perdew, petru, pettigrew, picchu, picou, popu, quazulu, radu, raju, rearview, reissue, renfrew, rescue, rettew, rilwanu, robidoux, sakau, sandhu, sassou, schmittou, seibu, seiyu, serviou, settsu, shigeru, shimizu, shinxiaku, shugrue, sidhu, sisulu, snafu, subaru, sugrue, sukru, sununu, supervalu, susumu, taegu, taewoo, takushoku, tanu, telugu, tequiliu, theodorou, tofu, tokyu, toru, toshiharu, toshimitsu, transue, tsutomu, tunku, umetsu, undervalue, unrue, unruh, unto, valu, value, vanliew, vanuatu, vanunu, vassiliou, venue, vibhu, virtue, vishnu, w, w., wasiyu, whoopdedoo, wilthew, yanbu, yenlu, yoshikazu, zbigniew, zurfluh
Siu sounds like:
s, s's, s., s.'s, sa, sac, sacca, sacco, sacco's, saccoccio, sacha, sachi, sachs, sachs', sachs's, sachse, sack, sacks, saco, sacs, saechao, saez, sag, saga, sagas, sage, sage's, sages, saggese, sago, sags, saha, sai, saia, saiki, sais, saiz, sajak, sak, sakaguchi, sakai, sakau, sake, sake's, sakes, saki, sakigake, sako, sakowski, saks, saks's, saksa, sao, sas, sasaki, sasek, sash, sasha, sashes, sass, sasse, sassi, sasso, sassou, sassy, sassy's, sauce, sauces, saucy, sauey, sauk, saus, sausage, sausages, sause, saw, sawa, sawaya, sawchuk, sawicki, sawicz, sawka, saws, sax, saxe, say, saye, sayegh, says, scaccia, scaggs, scags, schaack, schack, schaja, schake, schau, schaus, scheck, scheu, schewe, schey, schick, schiess, schiewe, schoch, schock, schoeck, schoo, schook, schou, schow, schuch, schuck, schue, schug, schuh, schwake, schweich, schweiss, schwiesow, schwisow, sci, sciacca, sciascia, scios, scocozza, scow, se, sea, sea's, seaco, seaga, seago, seahawk, seahawks, seaq, seas, sease, seasick, seaway, seay, sec, secaucus, secchia, seck, seco, secoy, see, seek, seeks, sees, seesaw, seese, sega, sega's, sege, sego, segue, seige, seiji, seiki, seiko, seis, seix, seixas, seiyaku, seiyu, seize, seizes, seki, sekisui, seko, seko's, seo, seow, seow's, sequa, sequa's, sequoia, sequoias, sequoyah, sese, sessa, seuss, sew, sewage, sex, sexes, sexy, seyi, sh, sha, shaak, shack, shacks, shag, shaggy, shah, shah's, shai, shaik, shaikh, shaka, shake, shakes, shaky, shao, shaq, shas, shashoua, shaw, shaw's, shawgo, shay, shays, she, she's, shea, shea's, sheck, sheck's, sheehy, sheek, sheeks, sheesh, shegog, sheik, sheik's, sheikh, sheiks, shek, shek's, shew, shewchuk, shh, shi, shia, shiah, shias, shick, shieh, shies, shigeki, shigeo, shih, shiu, shizuka, shizuoka, shock, shockey, shocks, shoe, shoe's, shoes, shoichi, shoji, shoko, shoo, shook, shosh, shough, shouse, show, show's, showa, showcase, showcases, shows, shows', showy, shu, shuck, shucks, shue, shuey, shui, shuwa, shuwa's, shy, si, sias, sic, sica, sick, sie, sieck, sieg, siege, sieges, sieh, sieja, siek, sies, siese, siess, siew, sig, sigg, sigh, sighs, sikes, sikh, sikhs, sioux, sis, sisco, siscoe, sisk, siska, sisko, sissie, sissy, siwek, six, six's, sixes, size, sizes, skaggs, skase, skees, skeoch, skew, skewes, skews, ski, skies, skis, skog, skok, skokie, skoog, skow, sky, sky's, skyhawk, skyhawks, skyhigh, skyway, so, so's, so-so, soak, soaks, socci, socha, sochacki, sochi, socia, socio, sock, socks, soco, soco's, soggy, sogo, sohio, soho, soja, sojka, sok, sokaiya, soo, soohoo, soos, sooy, sosa, soshi, soss, sosuke, soucek, soucie, soucy, souk, sous, sousa, sousa's, souza, souzas, sow, sowa, sowash, sows, sox, sox's, soy, soya, soyka, soysauce, soyuz, soyuz's, soza, sozio, squash, squashy, squawk, squawks, squeak, squeaks, squeaky, squeegee, squeeze, squeezes, squishy, su, suazo, suc, success, successes, such, suchecki, suchocki, suchy, suck, suckow, sucks, sue, sues, suess, suey, suez, suez's, sugg, suggs, suh, suhua, sui, suisse, suisse's, suk, sukey, suki, sukiyaki, sus, susa, sushi, susi, susie, susie's, suski, susko, suss, sussex, susy, suu, suzhou, suzie, suzuki, suzy, suzy's, swasey, sway, sways, swayze, swazi, sweazy, sweezey, sweezy, sweig, swezey, swick, swiech, swig, swish, swishes, swiss, swoosh, sy, sykes, sysco, szczech, sze, szewczyk, szoke, szuch, szucs