Richstone rhymes with:
touchstone, blackstone, bloodstone, bluestone, blystone, bridgestone, brookstone, brownstone, capstone, cherrystone, cobblestone, cornerstone, coverstone, curbstone, eyestone, featherstone, finestone, firestone, flagstone, folkstone, freestone, gallstone, gemstone, gladstone, goldstone, gravestone, greenstone, greystone, grindstone, hailstone, headstone, instone, johnstone, keystone, levinstone, lightstone, limestone, livingstone, lodestone, medstone, milestone, millstone, moonstone, poundstone, redstone, rhinestone, sandstone, silverstone, steppingstone, tombstone, touchstone, waterstone, weatherstone, wedgestone, whetstone, whitestone, yellowstone
Richstone sounds like:
ragtime, reaction, recitation, recoton, rectum, rejection, requisition, restaino, restitution, reston, resuscitation, ricadonna, richton, rigatoni, rigdon, risden, risdon, riston, rocketdyne, rosten, roston, roughton, royston, rushton, rustin, ruston