Soo rhymes with:
ensue, karatsu, komatsu, pursue, siew, sioux, su, sue, tsu, abou, abreu, accrue, adieu, ado, aeroperu, anew, askew, babu, badu, baku, ballou, ballyhoo, bamboo, bellew, belyeu, benhamou, beu, bleu, blew, blue, boo, brew, brue, byu, c2, canoe, carilou, cat-2, cebu, chaloux, champoux, chengdu, chew, chiu, choo, chou, chu, clue, cmu, construe, coo, corbu, cou, coup, coutu, crew, crewe, cue, deblois, debut, decou, depew, depue, deux, dew, dfw, do, doo, douwe, drew, drive-thru, dru, du, due, egnew, ensue, eschew, ewe, fauroux, few, fitzhugh, flew, flu, flue, fondue, foo, fourtou, frew, frueh, fu, geroux, gignoux, giroux, glew, glue, gnu, goo, grew, grewe, gu, gue, heroux, herscu, hew, hewe, hitherto, hoo, hou, houx, hsu, hu, hue, hugh, hullabaloo, igou, imbue, into, iou, jammu, jamu, jew, joo, ju, jue, jus, kalamazoo, kangaroo, karatsu, katmandu, kazoo, ketou, kew, khoo, khuu, knew, komatsu, koo, ku, kwangju, kyu, laroux, larue, ledoux, lemieux, leroux, leu, lew, lhommedieu, lieu, liou, liu, long-overdue, loo, lou, louw, loux, lu, lue, m2, mailloux, marcou, marcoux, marrou, mccue, mcgrew, mcgue, mchugh, mcknew, mcnew, meiyuh, mew, misconstrue, moo, mu, n92762, neveu, new, nu, ooh, oooh, ou, outdo, outgrew, overdo, overdue, overthrew, pas-de-deux, perdue, peru, peugh, pew, phew, phu, plew, plue, poo, pooh, pou, prew, pru, prue, prugh, pshew, pu, pugh, purdue, pursue, q, q., qu, que, queue, ragu, ramu, raoux, ratu, redo, renew, reto, review, revue, rew, rhew, rhue, richoux, rioux, roux, ru, rue, schewe, schoo, schou, schue, schuh, screw, seydoux, shampoo, shamu, shew, shiu, shoe, shoo, shu, shue, siew, sioux, skew, slew, spew, stew, strew, stu, stuewe, su, subdue, sue, suu, taboo, tattoo, tatu, tew, thankyou, theroux, thew, threw, through, thru, thuy, tien-fu, tieu, timbuktu, to, tobu, too, toyoo, treu, trew, trieu, troyu, true, true-view, tsu, tu, tue, two, u, u., undo, undue, unglue, untrue, urdu, uwe, vanlue, view, vous, vu, vue, wahoo, wenzhou, whay-yu, whew, who, withdrew, woo, wu, xu, xue, yabbadabbadoo, yew, yoo, you, yu, yue, zanu, zhambu, zhou, zhu, zoo, zue, zungu
Soo 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, siu, 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, 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