British English to American English: Letter F
Factorise Factorize
          Faecal Fecal
          Faeces Feces
          Faggot Fagot
          Fair Carnival
          Fairy cake Cup cake
          Familiarise Familiarize
          Fancy dress party Costume party
          Fanlight Transom
          Fantasise Fantasize
          Farrier ferrier
          Father Christmas Santa Claus
          Favour  Favor
          Favourite  Favorite 
          Favouritism Favoritism
          Feminise Feminize
          Fencing Fences
          Fertilise Fertilize
          Fervour Fervor
          Fibre  Fiber
        Fictionalise Fictionalize

          Fieldsman Fielder
          Fillet Filet
          Film  Movie
          Finalise Finalize
          Fire Brigade Fire department
          Fire station Firehouse
          Fire engine Fire truck
          Firework Firecracker
          First floor Second floor
          Fishing rod Fishing pole 
          Fish fingers Fish sticks
          Fishmonger  Fish seller
          Fitted (past tense: fit) Fit (past tense: fit)
          Fitted carpet Wall-to-wall carpet
          Fiver = a 5 denomination banknote  
          Fizzy drink, pop, softdrink Soda
          Flammable liquid Combustible liquid
          Flannel (face) Wash cloth (face)
          Flat Apartment
          Flats (block of ~) Apartment block/building 
          Flavour Flavor
          Flavouring Flavors
          Flautist  Flutist
          Flex Extension cord/elecrical wire
          Flexitime Flextime
          Flick knife Switchblade
          Floatation Flotation
          Fluid ounce = 1.73 cu in Fluid ounce = 1.80 cu in
          Flurry Blizzard
          Flyer Flier
          Flyover Overpass
          Flypast Flyover
          Foetus  Fetus
          Folks (no use in the UK) Folks
          Founder’s type Foundry type
          Fount (pl. of font) Font
          Foolscap =  
          Football Soccer
          Footballer Football player
          Football match Football game

          Foot the bill Bankroll
          Footpath  Sidewalk
          Footpath  Sidewalk
          Forecast, Forecasted, Forecasted Forecast, Forecast, Forecast
          Forego Forgo
          Form (first) Grade (first)
          Form (second) Grade (second)
          Form (third) Grade (third)
          Form (fourth) Grade (fourth)
          Formalise Formalize
          Fortnight Fortnight (no use in the US) 14 days
          Four by four Four wheel drive
          Founder member Charter member
          Foyer Lobby
          Fraternise Fraternize
          Freight wagon Boxcar
          Free diving skin diving
          Freezer Deep freeze
          French windows french doors
          Frier,  Fryer fryer
          Fringe Bangs
          Frivolled Frivoled
          Frivoller Frivoler
          Frivolling Frivoling
          Fruiterer =  
          Fruit machine  Slot machine
          Frying pan Fry-pan 
          Fuelled Fueled
          Fuelling Fueling
          Fulfil  Fulfill
          Fulfilled Fulfilled
          Fulfilling Fulfilling
          Fulfilment  Fulfillment
          Fulfilling Fulfilling SAME
          Fulfils Fulfills

          Full marks =  "excellent"
          Full stop/Full point Period
          Fullness Fulness 
          Funfair Amusement park
          Funny bone Crazy bone
          Furore Furor 
          Further Education Adult Education
Have I missed anything? Send in your American/British differences now.


