Nonvocal, a word that simply means not producing sound or not speaking, has a number of interesting synonyms that can be used to liven up one's vocabulary. For instance, the word "mute" denotes a person or animal who is unable or unwilling to speak, while "silent" refers to something not emitting any noise or devoid of sound. "Speechless" is another synonym that describes a state of being without words or language. Similarly, "soundless" and "voiceless" refer to the absence of sound produced by a person or an object. Finally, the word "wordless" suggests something that is expressed without the need for words. All of these synonyms for nonvocal can come in handy for writers, poets, and communicators looking to add variety to their language use.