Synonyms for the phrase "splits the ears" refer to sounds that are extremely loud and piercing. These include ear-piercing, deafening, thunderous, resounding, cacophonous, and blaring. The noise could be so loud that it hurts your ears or causes a ringing sensation. Other related terms include high-pitched, screeching, screaming, and shrill. These words are mostly used to describe sounds that are unpleasant or jarring to the ears. Conversely, they can also be used to describe powerful and awe-inspiring sounds such as thunderclaps, explosions, or a great roar of applause.