Silence is the absence of sound, but there are a variety of synonyms that can convey different nuances of the word. Serenity implies a peaceful silence, while stillness can refer to a lack of movement or activity. Quietness suggests a hushed or subdued sound, whereas muteness is the inability to speak or make noise. Tranquility and calm can both refer to a peaceful silence but evoke different feelings for the speaker or the setting. Sometimes, silence is used to convey secrecy, so reticence or reserve might be appropriate synonyms. Finally, peace can convey both a lack of sound and a state of calm and unity.