| lethargic(adjective, dull, slow, sluggish, lazy) |
| muteness(noun, calm, quiet, silence, serenity) |
| quiet(noun, adjective, calm, silence, reserved) |
| quietude(noun, calm, quiet, silence, serenity) |
| reserved(adjective, quiet, silent, mute, speechless) |
| reticence(noun, calm, quiet, silence, serenity) |
| silence(noun, calm, quiet, serenity, muteness) |
| slack(adjective, dull, slow, sluggish, lazy) |
| slow(adjective, dull, sluggish, lazy, inactive) |
| sluggish(adjective, dull, slow, lazy, inactive) |
| soundlessness(noun, calm, quiet, silence, serenity) |
| speechlessness(noun, calm, quiet, silence, serenity) |
| stillness(noun, calm, quiet, silence, serenity) |
| taciturnity(noun, calm, quiet, silence, serenity) |
| tongueless(adjective, quiet, reserved, silent, mute) |
| vacillate(verb, dawdle, fumble, hum, murmur) |
| voiceless(adjective, quiet, reserved, silent, mute) |
| voicelessness(noun, calm, quiet, silence, serenity) |
| reticent(adjective, quiet, reserved, silent, mute) |