Kippur rhymes with:
kipper, skipper, chipper, clipper, dipper, flipper, gipper, hipper, kipper, knipper, lipper, nipper, ripper, schipper, shipper, skipper, slipper, stripper, tipper, tripper, zipper
Kippur sounds like:
kafer, kapfer, kapoor, kapor, kapper, kapur, kaspar, kasper, kaufer, kaypro, keefer, keeper, keever, kefauver, keffer, keifer, keiffer, keiper, kever, kiefer, kieffer, kieper, kifer, kiper, kipfer, kipper, kober, kochevar, koper, kopera, kopper, kovar, kover, kuiper, kuper, kupfer, kupor, kupper, kuyper