A watercraft designed to operate underwater; esp., a naval warship so designed, armed with torpedoes, etc.
Sub is short for submarine, subscription, substitute or a submarine sandwich.
A German submarine in service during WWI or WWII
Find another word for pigboat. In this page you can discover 3 synonyms, antonyms, idiomatic expressions, and related words for pigboat, like: submarine, sub and u-boat.