Slacks rhymes with:
black's, blacks, blacks', flax, lac's, lacks, lax, plack's, plaques, plax, relax
Slacks sounds like:
sails, sal's, salacious, salak, salas, salaz, salce, sale's, salek, sales, sales', salick, salis, salk, salk's, sallas, salles, sallies, sallis, salls, sally's, salois, saloojee, salsa, salus, salz, sauls, sayles, scales, scalese, scalia's, scalise, scalisi, scalzi, scalzo, schalk, schallock, schellhase, schielke, schilke, schillaci, schilz, schlack, schlag, schlake, schlauch, schleich, schleis, schleswig, schlick, schlock, schloss, schlough, scholes, scholz, scholze, school's, schoolhouse, schools, schools', schuelke, schulke, schulz, schulze, scillas, scoles, sculley's, seagull's, seagulls, seal's, seales, sealey's, sealock, seals, seashells, seelig, seelig's, segalas, seils, selas, selassie, selchow, seles, seles', selies, selies', selig, seliga, seljuk, selk, selke, selleck, sellick, sells, selowsky, selz, seoul's, sequels, sexless, seychelles, shackles, shalala's, shales, shall's, shashlik, shaulis, shawls, sheila's, sheils, shekels, shell's, shelley's, shells, shellshock, shiels, shlaes, shoals, shoelace, shoelaces, sholes, shylock, sickels, sickles, siegel's, sielski, silas, silcox, silesia, silex, silga, silica, silk, silkey, silks, silky, sills, silos, siskel's, skalicky, skalski, skalsky, skeels, skiles, skills, skoczylas, skulk, skulls, skyles, slack, slag, slash, slashes, slaugh, sleaze, sleazy, sleek, sleigh, slezak, slice, slices, slick, slicks, sligh, slog, slosh, sloss, slouch, slouches, slough, sloughs, slowik, slows, slug, sluga, sluggish, slugs, sluice, sluka, slush, sluss, socialize, sociology, soil's, soils, sokolik, sokoloski, sokolow's, sokolowski, solace, solak, solazzo, solchaga, solecki, soles, soliloquize, soliloquy, solis, soliz, sollish, solos, soules, souljah, soulless, souls, sowles, squalls, squeals, squelch, squiggles, squillace, sulak, sulawesi, sulek, suleski, sulewski, sulik, sulk, sulkowski, swailes, swails, swales, swallows, swells, szalkowski, szeliga, szilagyi