castle vs go

castle and go both are nouns.

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

As verbs, go is a hypernym of castle; that is, go is a word with a broader meaning than castle:

castle: move the king two squares toward a rook and in the same move the rook to the square next past the king
go: have a turn; make one's move in a game

Other hypernyms of castle include move.

castle (noun)	go (noun)
interchanging the positions of the king and a rook	a board game for two players who place counters on a grid; the object is to surround and so capture the opponent's counters
a large building formerly occupied by a ruler and fortified against attack	a usually brief attempt
(chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard	street names for methylenedioxymethamphetamine
a large and stately mansion	a time period for working (after which you will be relieved by someone else)

castle (adjective)	go (adjective)
	functioning correctly and ready for action

castle (verb)	go (verb)
move the king two squares toward a rook and in the same move the rook to the square next past the king	pass from physical life and lose all bodily attributes and functions necessary to sustain life
	follow a certain course
	progress by being changed
	stop operating or functioning
	enter or assume a certain state or condition
	be abolished or discarded
	give support (to) or make a choice (of) one out of a group or number
	have a turn; make one's move in a game
	to be spent or finished
	be spent
	perform as expected when applied
	go through in search of something; search through someone's belongings in an unauthorized way
	change location; move, travel, or proceed, also metaphorically
	move away from a place into another direction
	begin or set in motion
	make a certain noise or sound
	follow a procedure or take a course
	stretch out over a distance, space, time, or scope; run or extend between two points or beyond a certain point
	have a particular form
	pass, fare, or elapse; of a certain state of affairs or action
	be in the right place or situation
	be the right size or shape; fit correctly or as desired
	be awarded; be allotted
	be or continue to be in a certain condition
	lead, extend, or afford access
	be ranked or compare
	blend or harmonize
	be sounded, played, or expressed
	be contained in
	continue to live and avoid dying