Lambs' rhymes with:
clams, lamb's, lambs, lamm's, slams, am's, ambs, ams, brams, cam's, clams, crams, dam's, damns, dams, drams, exams, grahams, gramm's, gramms, grams, hammes, hams, jam's, jams, krammes, lamb's, lambs, lamm's, mesdames, pam's, rams, sam's, samms, sams, scams, slams, tambs, trams, yams
Lambs' sounds like:
lamb's, lambiase, lambs, lamps, leimbach, leinbach, lembcke, lembke, lempke, limbach, limbaugh, limbaugh's, limbs, limps, lineback, linebaugh, lineups, lompoc, lumbago, lumps