Synonyms of the word

soundlessness

• n. The state or condition of being soundless.

quiet

• adj. With little or no sound; free of disturbing noise.
• adj. Having little motion or activity; calm.
• adj. Not busy, of low quantity.
• adj. Not talking much or not talking loudly; reserved.
• adj. Not showy; undemonstrative.
• adj. (software) Requiring little or no interaction.
• v. To become quiet, silent, still, tranquil, calm.
• v. To cause someone to become quiet.
• n. The absence of sound; quietness.
• n. the absence of movement; stillness, tranquility.
• interj. Be quiet.

quietness

• n. Absence of sound; silence or hush.
• n. Absence of disturbance; calm, stillness or serenity.

silence

• n. The lack of any sound.
• n. The act of refraining from speaking.
• n. Form of meditative worship practiced by the Society of Friends (Quakers); meeting for worship.
• v. (transitive) To make (someone or something) silent.
• v. (transitive) To suppress criticism, etc.
• v. (molecular biology) To block gene expression.
• interj. A common imperative instructing the addressed to remain silent.