fria - gene
- friable
- friar
- Friar
- friars balsam
- fricasseeing
- fricative
- frict drag
- frict factor
- frict pile
- friction
- Friction
- friction area
- Friction axis
- Friction back gear
- friction blisters
- Friction block
- friction brake
- Friction brake
- friction clutch
- Friction clutch
- friction cone
- friction cone, cone of friction
- Friction coupling
- friction disc
- Friction disc
- friction drag
- friction drive
- friction drive-transmission
- friction dynamometer
- friction factor
- Friction gearing
- Friction head
- Friction hoist
- Friction horse power
- friction layer
- friction loss
- friction metal
- Friction metal
- Friction motion
- Friction of motion
