A submarine is a type of watercraft that is capable of operating underwater. The term 'submarine' can be broken down into three letters, 'SUB'. A hoagy is a type of sandwich made with a long roll of Italian or French bread. This term can be broken down into five letters, 'HOAGY'. A HERO is a person who is admired for their courage and noble qualities. This term can be broken down into four letters, 'HERO'. A HOAGIE is a type of sandwich similar to a hoagy, but with more ingredients. This term can be broken down into six letters, 'HOAGIE'. Undersea is an adjective meaning beneath the surface of the sea. This term can be broken down into eight letters, 'UNDERSEA'. A po'boy is a type of sandwich typically made with fried seafood. This term can be broken down into five letters, 'POBOY'. Nautilus is a type of submarine developed by the United States Navy during World War II. This term can be broken down into eight letters, 'NAUTILUS'. A heandwich is a type of sandwich made with two slices of bread and a variety of fillings. This term can be broken down into nine letters, 'HEANDWICH'. A HERO sandwich is a type of sandwich made with two slices of bread and a variety of fillings. This term can be broken down into twelve letters, 'HEROSANDWICH'.