Cleven rhymes with:
kleven, kleven, leven, sleven, beaven, keven, kievan, kleven, leven, sleven, stephen, steven, uneven
Cleven sounds like:
califano, calvani, calvano, calvin, calvina, calvino, cellophane, cellphone, chalfin, clapham, clapman, clavin, clephane, colvin, cyclopean