flamear - to flutter, to flap

flanquear - to flank

flechar - to sweep off (amor)

flirtear - to flirt

flotar - to float

foetear - to horsewhip

foliar - to foliate, to number (páginas)

fomentar - to promote

fondear - to anchor

forjar - to forge, to create, to shape

formalizar - to formalize

formular - to formulate