Here is a list of nouns that start with FO.

foal, foam, foaming, foci, focusing

fodder, foe, fog, fogy, foil

fold, folder, foliage, folk, folklore

follower, following, folly, fontanel, food

fool, fooling, foot, footage, football

footbridge, footfall, foothill, footing, footman

footnote, footpath, footstep, footstool, footwear

footwork, for, forage, foraging, foray

force, fore, forearm, foreboding, forecast

forecasting, forefeet, forefinger, foregoing, foreground

forehead, foreigner, foreknowledge, foreleg, foreman

forepart, forerunner, foreshortening, foresight, forest

forestry, forethought, forge, forgery, fork

forklift, form, forma, formability, formalism

formality, format, formation, formative, formula

formulae, formulation, fort, forte, forthcoming

fortitude, fortnight, fortune, forum, fostering

fouling, foundation, founder, founding, foundling

fountain, fountainhead, foursome, fowl, fox

foyer

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