Karst rhymes with:
darst, garst, parsed, barhorst, bornhorst, borst, brandhorst, brunkhorst, darst, divorced, dorst, duerst, eichhorst, eichorst, endorsed, enforced, fierst, forced, forst, fuerst, garst, haselhorst, hohorst, horsed, horst, langhorst, lindhorst, outsourced, parsed, pierced, reinforced, scharnhorst, steinhorst, synhorst, terhorst, unenforced, unhorsed, vanderhorst, vanvoorst, vanvorst, walkenhorst, windhorst
Karst sounds like:
kaiseraugst, karstadt, kerst, kierscht, kierstead, kirkwood, kirst, kirstie, koreagate, kracht, kragt, krist, krista, kristi, kristie, kristy, krogstad