Synonyms and related words :
anaudia, aphasia, aphonia, aphrasia, brevity, briefness, brusqueness, conciseness, curtness, deaf-muteness, dumbness, economy of words, inarticulateness, jargon aphasia, laconicalness, laconism, loss of speech, motor aphasia, mutism, obmutescence, paranomia, paraphasia, pauciloquy, quietness, quietude, shortness, silence, sparingness of words, speechlessness, taciturnity, terseness, tonguelessness, unloquaciousness, untalkativeness, voicelessness, wordlessness