Hallmark's rhymes with:
hallmarks, hallmarks, cellmark's, hallmarks, benchmark's, benchmarks, birthmarks, bismarck's, caremark's, cellmark's, denmark's, deutschemark's, deutschemarks, earmarks, hallmarks, hartmarx, landmark's, landmarks, pathmark's, raymark's, southmark's, trademarks, watermarks, westmark's
Hallmark's sounds like:
hallmark, hallmarks, helmerich, helmers