Synonyms for Charnel (same or very similar meaning)
WordNet sense 1 (a vault or building where corpses or bones are deposited):
charnel houseWordNet sense 2 (gruesomely indicative of death or the dead):
ghastly, sepulchralWordNet sense 3 (unpleasant or disgusting especially to the senses):
offensiveFrom the ODE community, based on WordNetadd/edit