- flat-fish
- flea
- flesh-fly
- flitter-mice
- flounder
- fold
- follicular
- foraminifer
- forficate
- flowerfish
- fly-catcher
- flicker-mouse
- flipper
- fluke-worm
- flying fox
- flying squirrel
- fodder
- follicle
- footstalk
- fossorial
- foumart
- four-footed
- fourchette
- fox
- fox-terrier
- francolin
- fritillary
- frogging
- frugivorous
- fucivorous
- frigate-bird
- frof-spawn
- frog-fish
- frond
- frog
- froghopper
- fullmar
- fulmar
- galeeny
- gannet
- garfish
- frigate
- frit-fly
- frogling
- fructivorous
- gadoid
- gallinaceous
- gallinule
- ganoid
- fungivorous
- gad-fly
- gamma
- gar
- garefowl
- garrupa
- fur-seal
- gambrel
- gasteropod
- gastropode
- gayal
- gazelle
- geese
- geld
- gemsa
- gaur
- gavial
- gecko
- gelder
- genital
- geometrid
- german-fish
- gizzard-shad
- globe-fish
- glossina
- glow-worm
- gelt
- gemsbok
- genet
- gibbon
- globigerina
- glossophagine
- glowworm
- genitals
- geometer
- gerfalcon
- giraffe
- glochidium
- glutton
- goldcrest
- glyptodont
- gnu
- go
- goldfinch
- goldfish
- goanna
- goat
- goat-sucker
- goblefish
- goby
- grampus