20-letter words containing a, d, i, s, o
- william westmoreland — William Childs [chahyldz] /tʃaɪldz/ (Show IPA), 1914–2005, U.S. army officer: commander of U.S. forces in Vietnam and Thailand 1964–68.
- wilson cloud chamber — cloud chamber.
- woolsorters' disease — pulmonary anthrax in humans, caused by inhaling the spores of Bacillus anthracis, which may contaminate wool fleece.
- your marching orders — If you give someone their marching orders, you tell them that you no longer want or need them, for example as your employee or as your lover.