Saltwater rhymes with:
squatter, blotter, cotter, dotter, hotter, imprimatur, kotter, lotter, mahtar, mater, mccotter, motter, notter, otter, piotter, plotter, potter, rotter, schlotter, spotter, squatter, totter, trotter, yachter, zotter
Saltwater sounds like:
salter, saltier, salutary, saulter, schilder, schlater, schlatter, schleeter, schlitter, schlotter, schlueter, schluter, schowalter, schulder, shelter, shoulder, showalter, skelter, slater, slather, slatter, slattery, slayter, sleator, sleeter, slider, sliter, slither, slothower, sluder, sluiter, sluyter, slyter, solder, soldier, solitaire, solitary, solodar, soltero, sultry, swelter, sweltry