Guesstimate rhymes with:
aksamit, brumett, brumit, brumitt, brummet, brummett, brummitt, chaumet, crummett, dammit, delashmit, desmet, dimmitt, dummitt, emmet, emmett, emmit, emmitt, gamet, grimmett, hammett, hammitt, illegitimate, kermit, kimmet, kimmitt, kismet, recommit, samet, sammet, summitt, wilmet, zammit, zeimet