Synonyms for Hound (same or very similar meaning)
WordNet sense 1 (someone who is morally reprehensible):
blackguard, bounder, cad, dog, heelWordNet sense 2 (any of several breeds of dog used for hunting typically having large drooping ears):
hound dogWordNet sense 3 (pursue or chase relentlessly):
hunt, traceFrom the ODE community, based on WordNetadd/edit