Bombinated is not a commonly used word, and so its antonyms may not be as well-known. However, it is a verb that means to make a buzzing or humming noise, especially a droning sound. In contrast, some antonyms for bombinated could include things like being silent, hushed, or quiet. Other possible antonyms might include words such as nonvocal, mute, or noiseless. Essentially, any word that suggests a lack of sound or a lack of activity that would produce noise could be considered an antonym for bombinated. Overall, the antonyms for bombinated reflect its definition as a noisy or buzzing sound.