What is another word for "voiceless"?

Roget's Thesaurus (1911) lists these synonyms for "voiceless": absence, and, aphonia, aphonous, aphony, bated, breath, breathless, broken, childish, cracked, cut, deaf, drown, dry, dumb, dumbness, dumfounder, dummy, dysphony, faintness, falsetto, finger, fish, gag, harsh, hoarse, hollow, husky, inarticulate, inaudible, keep, low, mackerel, mouth, muffle, mum, mute, muzzle, obmutescence.