What is another word for "heaviness"?

Roget's Thesaurus (1911) lists these synonyms for "heaviness": analytical, and, arroba, avoirdupois, baby, balance, ballast, beam, blanket, book, boring, burden, burdensome, burthen, carat, caught, centigram, cold, commonplace, conte, counterpoise, cumber, cumbersome, cumbrous, damp, deadly, dearth, depress, ditch, drachma, dry, dull, dullness, dust, ear, fact, fall, flat, flatness, grain.