fill - fore
- fireman
- firemen's pensions
- fireproof
- fireproof safe clause
- firkin
- firm
- firm name
- firm name and style
- firma
- firma alba
- firma feodi
- firman
- firmaratio
- firmarius
- firme
- Firmior et potentior est operatio legis quam dispositio hominis
- first aid clause
- first annual election
- first bite
- first board
- first class
- first class dwelling
- first class turn-key job
- first conviction
- first cousin
- first cousin once removed
- first degree manslaughter
- first domestic processing
- first impression
- first in payment of taxes
- first in possession is first in right
- first in time
- first in time, first in right
- first in, first out
- first inventor
- first meeting
- first money in, first money out
- first mortgage
- first name
- first occupant