free - gene
- free bitumen
- free energy
- free energy of activation
- free energy of formation
- free gas
- free meander
- free oxide
- free radical
- free state
- free surface energy
- free valence
- free water
- freezing hole
- freezing nuclei
- freezing point
- freibergite
- fremontite
- frenzelite
- frequency
- frequency curve
- frequency distribution
- frequency of joints
- frequency spectrum
- fresh water
- fresh water animals
- fresh water barrier
- fresh water lake
- fresh water lens
- freyalite
- friable
- friable rocks
- friable state
- friction
- friction breccia
- friction coefficient
- friction head
- friction layer
- friedelite
- frieseite
- fringing reef
