Similar Words to U-boat:
Pigboat
Sub
Submarine
Examples:
1. The papers are full of stories about those Germans who landed from a U-boat down north.
2. I don't suppose you've heard of the U-boat sunk in Hudson Bay and the escaped Germans?
3. Gentlemen Three cheers for our galant U-boat men.
4. To the German U-boat service and out beloved Fuhrer We're not exactly at home if you understand what I mean.
5. Third U-boat flotilla welcome back home. Three cheers.
Definitions of U-boat:
1. A submersible warship usually armed with torpedoes