More fullthroated is often used to describe a voice that is strong, passionate, and confident. There are many synonyms for this term, including sonorous, resonant, booming, powerful, and assertive. A sonorous voice is deep and rich, while a resonant voice is clear and strong. A booming voice has a deep, commanding tone, while a powerful voice conveys strength and authority. An assertive voice is confident and self-assured, with a clear and forceful tone. All of these synonyms capture the qualities of a more fullthroated voice and can be used interchangeably to describe someone who speaks with passion and conviction.