Trumpet-voiced is an adjective used to describe a person who has a loud and commanding voice, much like that of a trumpet. However, there are several other synonyms that one can use to describe such a voice. Some of these synonyms include booming, thundering, resonant, sonorous, powerful, and authoritative. Each of these words captures the essence of a commanding voice that grabs the attention of people and makes them focus on the speaker. Whether you are writing a novel, composing a speech, or simply trying to describe someone's voice in a conversation, you can choose any of these synonyms as an alternative to "trumpet-voiced".