Moonstones rhymes with:
rhinestones, blackstone's, bridgestone's, cherrystones, cobblestones, cornerstones, firestone's, flagstones, folkstone's, gallstones, gemstones, gladstones, gravestones, hailstones, headstones, keystone's, keystones, limestones, livingstone's, madstones, milestones, redstone's, rhinestones, tombstones, waterstone's, yellowstone's
Moonstones sounds like:
macdonough, maktoums, mangosteens, mcadams, mcdonagh, mcdonough, megatons, mesdames, minnesotans, misquoting, misstating, mustang, mustangs