- Any of various burrowing crabs of the genusUca of coastal areas, the male of which has a greatly enlarged anterior claw. 招潮蟹：一种招潮蟹 属穴居蟹，居于海岸边，雄蟹有一只特别大的螯
- Frederick III
- Frederick IX
- Fredericksburg
- Frederick the Great
- Frederick VI
- Frederick William
- Frederick William I
- Frederick William II
- Frederick William III
- Frederick William IV
- Fredericton
- Frederiksberg
- free
- free
- free agent
- free alongside ship
- free alongside vessel
- free-associate
- free association
- freebase
- freebee
- freebie
- freebies
- freeboard
- freeboard deck