"Out of tone" is a phrase that describes something that is not in harmony, often used to describe music or speech. There are several synonyms for this phrase that can be used interchangeably, including "off-key," "discordant," "dissonant," "off-pitch," and "unmelodious." Each of these descriptors can be used to convey a similar sense of something that is not in tune or not in sync with its surroundings. Using synonyms can help writers convey their message with greater precision, and provide a wider range of language choices to use when communicating about something that is "out of tone".