un·caused 
(ŭn-kôzd)
(ŭn-kôzd)adj.
Existing without a perceptible cause; spontaneous.
- four-peat
- fourpenny nail
- fourplex
- four-poster
- fourragère
- fourscore
- foursome
- foursquare
- foursquarely
- four-star
- fourteen
- fourteenth
- fourth
- fourth dimension
- fourth estate
- Fourth of July
- fourth quantum number
- fourth wall
- Fourth World
- Fourth-World
- four-way
- four-wheel drive
- four-wheeler
- Fouta Djallon
- fovea