Sdn rhymes with:
lpn, adrienne, again, amen, anchormen, antenne, beaubien, beauchesne, behn, behne, ben, benn, benne, bren, brenn, cayenne, chen, chien, cnn, cnnfn, comedienne, councilmen, courchesne, dehn, dehne, den, denn, denne, derouen, duchenne, dufresne, en, fehn, fen, fenn, georgienne, glen, glenn, gren, gwen, handymen, hehn, hen, henn, henne, hren, jen, jenn, jenne, jiawen, kehn, kehne, ken, kenn, knin, kren, krenn, lawmen, lehn, lehne, len, lpn, madeleine, magten, men, menn, menne, ming-jen, n, n., nguyen, oilmen, patrolmen, pen, penh, penn, phen, phenfen, pitchmen, po-jen, prehn, prenn, rehn, ren, renn, renne, salmen, schwenn, sebastiane, sen, senn, senne, shen, sheng-fen, sten, sven, ten, teng-wen, then, tien, tienanmen, uren, venn, venne, wen, when, wren, wrenn, yen, yuen, zen
Sdn sounds like:
saddam, sadden, saidan, saitama, saskatoon, satan, satin, sawdon, saxton, scadden, scatena, schaden, schechtman, schettino, schouten, schuitema, scicchitano, scotten, scotton, scouten, scowden, scythian, seaton, section, sedam, sedan, sedano, sedation, seddon, sedition, sedona, sedum, seetin, seeton, seiden, seidman, seitman, seton, settanni, sexton, shadden, shadoan, shakedown, shasteen, shatman, shedden, sheikdom, shootdown, shootin', showdown, showtime, shutdown, sidden, sideman, sidman, sidney, sidon, sidonia, sistine, sittin', sitton, situation, sixteen, sjodin, skadden, skydome, sodano, sodden, soden, sodium, sodom, sodomy, southam, southdown, southin, sowden, stadium, stain, stam, stamey, stamina, stamm, stammen, stan, stanaway, stann, stannie, stano, stanway, staten, statham, statin, station, staton, stattin, statton, statum, stayton, steadham, steadman, steam, steamy, stedman, steedman, steen, steeton, stehman, steidtmann, steiman, stein, steinem, steinman, steinmann, steinway, stem, stemen, stemm, sten, stena, stene, steno, steny, stethem, stidham, stine, stineman, stone, stoneham, stoneman, stoney, stony, studeman, stum, stumm, stun, stymie, styne, suction, sudan, sudano, suddam, sudden, sugden, suggestion, sustain, sutton, suydam, sweatin', sweatman, sweden, sweeden, sweeten, sweetman, sweeton, swetnam, sydney, system, systemone