1 Syllablebosh, cosh, gosh, josh, posh, quash, splosh, squash, swash, tosh, wash
Now you can make multisyllabic rhymes in the new rhymit app :)
2 Syllablesawash, backwash, brainwash, eyewash, galosh, golosh, moustache
3 Syllablesgouache, mackintosh, whitewash