Thunderball is a unique and distinctive word that refers to a large, heavy ball of thunder. While there may not be many exact synonyms for thunderball, there are various words and phrases that convey the same general idea, such as thunderous ball, stormball, lightning sphere, electric orb, tempestuous globe, and thundering bolus. Each of these terms alludes to the power and fury of a massive ball of thunder, representing the intense energy and ferocity that is often associated with stormy weather. While there may be differences in connotation between these synonyms, they all capture the essence of what a thunderball represents.