dungeon vs castle

dungeon and castle both are nouns.

Word	Noun	Adjective	Verb	Adverb
dungeon	Yes	No	No	No
castle	Yes	No	Yes	No

dungeon (noun)	castle (noun)
the main tower within the walls of a medieval castle or fortress	interchanging the positions of the king and a rook
a dark cell (usually underground) where prisoners can be confined	a large building formerly occupied by a ruler and fortified against attack
	(chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard
	a large and stately mansion

dungeon (verb)	castle (verb)
	move the king two squares toward a rook and in the same move the rook to the square next past the king