16-letter words starting with so
- sounding balloon — a balloon carrying instruments aloft to make atmospheric measurements, especially a radiosonde balloon.
- sounding machine — any of various machines for taking and recording soundings.
- sour-milk cheese — cottage cheese made from sour milk.
- source materials — publications from which information is obtained
- south australian — a state in S Australia. 380,070 sq. mi. (984,380 sq. km). Capital: Adelaide.
- south burlington — a town in NW Vermont.
- south carolinian — a state in the SE United States, on the Atlantic coast. 31,055 sq. mi. (80,430 sq. km). Capital: Columbia. Abbreviation: SC (for use with zip code), S.C.
- south charleston — a city in W West Virginia.
- south huntington — a town in central Long Island, in SE New York.
- south lake tahoe — a city in E California.
- south plainfield — a city in N New Jersey.
- south sea bubble — the financial crash that occurred in 1720 after the South Sea Company had taken over the national debt in return for a monopoly of trade with the South Seas, causing feverish speculation in their stocks
- south vietnamese — of or relating to the former South Vietnam (now part of Vietnam) or its inhabitants
- southerly buster — a sudden violent cold wind on the SE coast of Australia causing a rapid drop in temperature
- southern baptist — a member of the Southern Baptist Convention, founded in Augusta, Georgia, in 1845, that is strictly Calvinistic and active in religious publishing and education.
- southern uplands — a hilly region extending across S Scotland: includes the Lowther, Moorfoot, and Lammermuir hills