All back door synonyms

noun back door

• postern — a back door or gate.
• back stairs — stairs at the back of a house, as for use by servants.
• trap door — a door flush with the surface of a floor, ceiling, or roof.
• trapdoor — a door flush with the surface of a floor, ceiling, or roof.
• wormhole — a hole made by a burrowing or gnawing worm, as in timber, nuts, etc.