U-boat /ūˈbōt or (German) ooˈ/

A German submarine

• folk tale
• folk tales
• folk tune
• folk tunes
• folkway
• folkways
• folk-weave
• follicle
• follicles
• follicle-stimulating hormone
• follicle-stimulating hormones
• follicular
• folliculated
• folliculose
• folliculous
• follied
• follies
• follow
• follow-board
• follow-boards
• followed
• follower
• followers
• follow home
• following