The word bigvoiced refers to someone or something that has a loud and powerful voice. Some synonyms for this word include thunderous, resonant, booming, sonorous, and stentorian. Thunderous refers to a loud and deep sound that resembles thunder. Resonant pertains to a sound that is rich and full because it seems to echo or vibrate. Booming relates to an explosive sound that is deep and full. Sonorous refers to a sound that is pleasing to the ear, deep, and rich. Stentorian alludes to a voice that is extremely loud, piercing, and commanding, often used to describe a passionate speaker or singer.