F字母开头的单词或词组(第17页)：
- fidget
- fetter
- fetus
- fiat
- file
- filter
- filigree
- filings
- filibuster
- filly
- filth
- finale
- finesse
- finicky
- finite
- fiscal
- firearm
- firefly
- fissure
- fixate
- flaccid
- flag
- flaggy
- flagging
- flagrant
- flail
- flak
- flamboyant
- flammable
- flange
- flare
- flask
- flatcar
- flatten
- flatter
- flaunty
- flaunt
- flaw
- flax
- fledge
- fledgling
- fleeting
- flexible
- flight