gatepost (n.)

• archway
• baluster
• balustrade
• banister
• bulkhead
• door
• doorjamb
• doorpost
• doorway
• gate
• gateway
• hatch
• hatchway
• jamb
• lintel
• milepost
• mullion
• porch
• portal
• post
• postern
• pylon
• scuttle
• signpost
• stanchion
• standard
• stile
• threshold
• tollgate
• trap
• turnpike
• turnstile
• upright