THESAURUS
dumbness
anaudia, aphasia, aphonia, asininity, blockishness, boobishness, boorishness, bovinity, brevity, briefness, brusqueness, cloddishness, conciseness, crassness, crudeness, curtness, deaf-muteness, denseness, density, dim-wittedness, dimness, doltishness, dull-wittedness, dullardism, dullness, duncery, economy of words, grossness, hebetude, inarticulateness, laconicalness, laconism, lethargy, loutishness, lumpishness, muteness, mutism, ninnyism, oafdom, oafishness, obmutescence, obtuseness, opacity, pauciloquy, quietness, quietude, shortness, silence, simpletonianism, slowness, sluggishness, sottishness, sparingness of words, speechlessness, stolidity, stupidity, taciturnity, terseness, thick-headedness, thick-wittedness, tonguelessness, unloquaciousness, untalkativeness, unteachability, voicelessness, wordlessness, wrongheadedness, yokelism
ROGET THESAURUS
dumbness
Aphony
N
aphony, aphonia,
dumbness, obmutescence, absence of voice, want of voice, dysphony, cacoepy, silence, raucity, harsh voice &c, unmusical voice, falsetto, childish treble mute, dummy, aphonous, dumb, mute, deafmute, deaf and dumb, mum, tongue-tied, breathless, tongueless, voiceless, speechless, wordless, mute as a fish, mute as a stockfish, mute as a mackerel, silent, muzzled, inarticulate, inaudible, croaking, raucous, hoarse, husky, dry, hollow, sepulchral, hoarse as a raven, rough, with bated breath, with the finger on the lips, sotto voce, in a low tone, in a cracked voice, in a broken voice, vox faucibus haesit.