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