- formation fluid
- formation fracturing
- formation map
- formation pressure
- formation sample
- formation test
- formation tester
- formation testing
- formic
- formica
- formol
- formyl
- fornacite
- forsterite
- forte board
- forward feeding
- fossil coal
- fossil flour
- fossil fuel
- fossil imprint
- fossil resin
- fossil rock
- fossil soil
- fossil wax
- fossiliferous
- fossiliferous layer
- fossiliferous limestone
- fossilism
- foul electrolyte
- foul gas
- foul solution
- fouling
- foundation coefficient
- fourway cock
- fowlerite
- fraction distillation
- fractional condensation
- fractional crystallization
- fractionate
- fractionating
- fractionating apparatus
- fractionating column
- fractionating tower
- fractionating tray
- fractionator
- fracture behavior
- fracture criterion
- fracture gradient
- fracture line
- fracture plane
- fracture porosity
- fracture strength
- fracture toughness
- fracture zone
- fracturing
- fracturing sand
- fragmental
- fragmentation
- frame connection
- frangibility
- frankincense
- Fredholm equation
- free acid
- free alkali
- free carbon
- free condition
- free cyanide
- free discharge
- free exhaust
- free face
- free flow
- free gas
- free linkage
- free metamorphism
- free sample
- free setting
- free speed
- free stone
- free sulfur
- free sulphur
- free trade
- free valence
- freezing brine
- french polish
- freon charging
- friction clutch
- friction gouge
- frictional loss
- frost riving
- frost-roof
- froth zone
- frothing
- frozen ground
- fructosan
- fucose
- fuel feeder
- fuel soot
- freezing curve
- fresh bit
- fresh oil