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