The word "caser" is often misspelled as "cazer" or "kaser". However, the correct spelling is /ˈkeɪ.zər/ with the long "a" sound and a "z" in the middle. It is derived from the Old French word "caser", meaning "to chase or hunt". In modern English, "caser" is not commonly used but is occasionally found in the context of horse racing as a term for a horse that is a strong contender in a race.