- family Taxaceae
- friend
- free zone
- field of battle
- flying field
- field of operation
- field of honor
- field of study
- field of operations
- force field
- field day
- fresh
- focus on
- feeling
- feign
- finger
- fecundate
- fertilise
- feminise
- form
- feminize
- fortify
- fatten
- Frenchify
- fatten up
- freshen
- full
- flocculate
- fat
- fertilize
- flesh out
- fill out
- flatten
- fatten out
- furbish up
- follow suit
- firmness
- firmness of purpose
- flinty
- flint
- freight
- fill in
- fipple
- feisty
- fleck
- fill again
- farce
- feeding
- forget
- fence