What is the longest one syllable word?

The longest one-syllable word in English language is "screeched". It is a verb meaning to make a harsh, high-pitched sound when something is being stopped or slowed down suddenly. Despite having nine letters, it is still considered a one-syllable word because it only has one vowel sound and one stressed sound, making it easily pronounced in a single beat or sound. The word also contains consecutive double letters, which is a rare occurrence in the English language.