- A dormer having a roof that slopes in the same direction as the roof in which the dormer is located.单坡屋顶窗：一种与其所处的屋顶同方向的天窗
- freewheeling
- freewill
- free will
- Free Will Baptist Bible College
- free world
- freeze
- freeze-dry
- freeze-etching
- freeze-frame
- freezer
- freezer burn
- freezers
- freezes
- freeze–dry
- freeze–etching
- freeze–frame
- freezing
- freezing point
- free zone
- free–associate
- free–fire zone
- free–floating
- free–for–all
- free–living
- free–range