1) Deck opening 2) Entrance 3) Entranceway 4) Entree 5) Entry 6) Entryway 7) Opening 8) Scuttle 1) Door 
• (n.) A square or oblong opening in a deck or floor, affording passage from one deck or story to another; the entrance to a cellar.
Hatch'way` (-wā`) noun A square or oblong opening in a deck or floor, affording passage from one deck or story to another; the entrance to a cellar. 
A hatchway is a square or rectangular opening in the deck of a ship, affording a passage from one deck to another, or into the hold. Traditionally, in a sailing ship the after-hatchway was placed near the stern, the fore-hatchway towards the bows, the main-hatchicay was placed near the mainmast.
[n] - an entrance equipped with a hatch
noun an entrance equipped with a hatch; especially a passageway between decks of a ship