OAL is a common abbreviation for the phrase "overall length." It is a term that is often used in the manufacturing, engineering, and construction industries to describe the total length of a product or structure. There are many synonyms for the word OAL, including overall size, total length, complete length, and total size. Other similar terms that are often used include overall dimension, complete dimension, full length, and full size. In general, these words are used interchangeably to describe the measurement of the entire length of an object, from end to end, without any exceptions or exclusions.