Middlesex rhymes with:
cybersex, gendrisek's, unisex, visx, adaptaplex, adaptec's, ameritech's, ametek's, amex, ampex, annex, apec's, apex, armtek's, audiotex, avtex, aztecs, banamex, berlex, biotechs, bottlenecks, cemex, centex, cineplex, comex, comtrex, crownx, cybersex, cytotechs, datarex, defex, discotheques, duplex, entex, equitex, eurochecks, eyetech's, fanech's, finex, gatx, gendrisek's, genentech's, gtech's, hyponex, inmex, intex, kaisertech's, latex, medarex, mediplex, memorex, memtec's, metex, methanex, metroplex, multidex, multiplex, natec's, neorx, nymex, nynex, opec's, oraflex, paychecks, paychex, pemex, pewex, pillowtex, playtex, portec's, prentnieks, qintex, railtex, rednecks, rolodex, roughnecks, scitex, simplex, starplex, steinbeck's, stratoflex, superx, symantec's, syntex, teleflex, telex, telmex, tenrecs, timeplex, tridex, trintex, truex, turtlenecks, unisex, ventritex, vertex, videotex, visx, wedtech's, westtech's
Middlesex sounds like:
madlock, mandela's, mantle's, mantles, matala's, matelski, matlack, matlick, matlock, mattel's, matulich, matulis, meatless, medals, medlock, mendel's, metal's, metallic, metallic's, metallica, metallica's, metals, metals', methodologies, methodology, mindless, model's, models, models', modules, mondale's, montel's, motels, mountleigh, mountleigh's, muddles, mutual's, mythology