- any of several scorpaenoid fishes of the family Platycephalidae, chiefly inhabiting waters of the Indo-Pacific region and used for food.
- a flat screw head.
- a member of an Indigenous people of northwest Montana.
- a member of a confederated nation of Salish and Kootenay peoples, established in 1855 and located in northwest Montana.
- a member of the Chinook people.
- of or relating to any of the peoples historically known as Flathead or to their languages.
- a river in SE British Columbia and NW Montana, flowing S to Flathead Lake and S and W to the Clark Fork River. 240 miles (385 km) long.
- any Pacific scorpaenoid food fish of the family Platycephalidae, which resemble gurnards