Folkstone's rhymes with:
blackstone's, blackstone's, bridgestone's, cherrystones, cobblestones, cornerstones, firestone's, flagstones, gallstones, gemstones, gladstones, gravestones, hailstones, headstones, keystone's, keystones, limestones, livingstone's, madstones, milestones, moonstones, redstone's, rhinestones, tombstones, waterstone's, yellowstone's
Folkstone's sounds like:
flagstones, flashdance, flashdances, fluctuating, fluctuations