Here's what rhymes with spontaneuos.
law la saw raw da ha jaw ma na sa pa ta wa ya ja ka ra ga moi paw thaw waa cha faw gnaw haa maw ois sha shah baa bah hah haw nah rah yaw caw sough soh rawer draw qua claw fhall flaw bra inlaw spa trois ulna bois chamois aha blah craw macaw slaw pshaw loofah straw alga squaw travaux hurrah overawe pasha patois fuchsia guffaw lockjaw baccarat jackdaw panama pawpaw borzois markkaa geegaw bourgeois foresaw oversaw voila redraw uninstall mackinaw southpaw outdraw withdraw overdraw scofflaw