What's another word for squeaky?

Another word for squeaky depends on context. If you mean making high-pitched sound, synonyms include squealing, creaky, screechy, screaky, chirpy, peepy, shrill, piercing, tinny, and piping. For example, squeaky door could be called creaky door or screechy door, squeaky voice could be called shrill voice or high-pitched voice. If you mean tending to squeak, alternatives are noisy, squeaking, or squeak-prone. If you mean morally clean as in squeaky clean, synonyms are spotless, immaculate, pristine, flawless, unblemished, perfect, and stainless. For example, squeaky clean record could be spotless record. For toys, squeaky toy could be called squealing toy or chirping toy. So there is no single perfect synonym for all uses, but closest for sound is squealing or creaky, for voice is shrill or high-pitched, and for clean is spotless. Choose based on whether squeaky refers to sound, tendency to make noise, or cleanliness. For general high-pitched noise, squealing is best alternative.