- fresh sewage
- freshwater marsh
- fretting corrosion
- friction breccia
- friction coupling
- friedelite
- fringe water
- frit
- fritted rock
- frost having
- frozen
- frozen brine
- fuel bed
- fuel fog
- fuel gas
- fuel hose
- fuel manifold
- fuel sensitivity
- fuel test
- fuel yard
- fulguration
- freezing interval
- freezing method
- fresh air
- freshening
- fretting fatigue
- friability
- friction head
- friction proof
- friction stress
- frictionless liquid
- fringe
- fringe well
- front slope
- frontal guiding
- frontal layer
- froth flotation
- fuel bell
- fuel gauge
- fuel hopper
- Fuel oil
- full annealing
- full lift
- full run
- full set
- fuel valve
- full hardening
- full load
- full maturity
- fulvene
- fumarole
- fumigant
- fuming
- funnel holder
- furan resin
- furfuraldehyde
- furfuryl
- furnace atmosphere
- furnace black
- furnace efficiency
- furnace fuel
- furol
- furred
- fused salt
- gabbro
- gaging sheet
- galactonic
- gale warning
- Gall effect
- galvanized steel
- galvanizing process
- gambier
- gamma prime
- gammexane
- ganomalite
- freight elevator
- freijo
- french chalk
- freon concentration
- freon contamination
- frequency indicator
- frequency range
- fresh fuel
- fresh mud
- friable
- friction loss
- friction stock
- frieseite
- fringing reef
- frontal moraine
- frontal precipitation
- frosting
- frozen ring
- fruehsite
- fucosterol
- fuel briquette
- fuel consumption
- fuel efficiency
- fuel line
- fuel mixture