The initial idioms of the letter F

fourpenny	fourpenny nail
four-petaled	four-petalled
four-ply	four-poster
four-pounder	four-pronged
fourscore	four-sided
foursome	four-spot
foursquare	four-square
four-stroke engine	four-stroke internal-combustion engine
four-tailed bandage	fourteen
fourteenth	Fourteenth Amendment
fourth	Fourth Council of Constantinople
fourth cranial nerve	fourth deck
fourth dimension	Fourth Earl of Chesterfield
Fourth Earl of Orford	fourth estate
Fourth Lateran Council	Fourth of July