chess piece vs rook

chess piece and rook both are nouns.

Word	Noun	Adjective	Verb	Adverb
chess piece	Yes	No	No	No
rook	Yes	No	Yes	No

As nouns, rook is a hyponym of chess piece; that is, rook is a word with a more specific, narrower meaning than chess piece:

chess piece: any of 16 white and 16 black pieces used in playing the game of chess
rook: (chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard

Other hyponyms of chess piece include bishop, castle, king, horse, knight, pawn, queen.

chess piece (noun)	rook (noun)
any of 16 white and 16 black pieces used in playing the game of chess	common gregarious Old World bird about the size and color of the American crow
	(chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard

chess piece (verb)	rook (verb)
	deprive of by deceit