Screakily is a word that is rarely used in everyday language, making it difficult to find synonyms for it. However, there are several alternative words that can be used in its place, depending on the context. If you are describing a sound that is high-pitched and grating, you can use words like shrilly, screechily, or piercingly. If you are describing a voice that is strained or hoarse, you can use words like croakily, raspily, or huskily. Other words that can be used to describe a sound that is unpleasant or irritating include gratingly, jarringly, and discordantly.