citadel

As nouns the difference between citadel and board

is that citadel is a strong fortress that sits high above a city while board is a relatively long, wide and thin piece of any material, usually wood or similar, often for use in construction or furniture-making or board can be (basketball|informal) a rebound.

As a verb board is

to step or climb onto or otherwise enter a ship, aircraft, train or other conveyance.

As a noun citadel

is a strong fortress that sits high above a city.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between chateau and citadel

is that chateau is while citadel is a strong fortress that sits high above a city.

As nouns the difference between ramparts and citadel

is that ramparts is while citadel is a strong fortress that sits high above a city.

As nouns the difference between citadel and kingdom

is that citadel is a strong fortress that sits high above a city while kingdom is a nation having as supreme ruler a king and/or queen.

As nouns the difference between citadel and haven

is that citadel is a strong fortress that sits high above a city while haven is a harbour or anchorage protected from the sea.

As a verb haven is

to put into, or provide with a haven.

As nouns the difference between citadel and cathedral

is that citadel is a strong fortress that sits high above a city while cathedral is a big church building, central place for some area.

As nouns the difference between capital and citadel

is that capital is capital while citadel is a strong fortress that sits high above a city.

As nouns the difference between citadel and towers

is that citadel is a strong fortress that sits high above a city while towers is .

As a verb towers is

(tower).