back vs go

back and go both are nouns.

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

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

Other hypernyms of back include locomote, move, travel.

back (noun)	go (noun)
(American football) the position of a player on a football team who is stationed behind the line of scrimmage	a board game for two players who place counters on a grid; the object is to surround and so capture the opponent's counters
the side that goes last or is not normally seen	a usually brief attempt
a support that you can lean against while sitting	street names for methylenedioxymethamphetamine
the part of a garment that covers the back of your body	a time period for working (after which you will be relieved by someone else)
the protective covering on the front, back, and spine of a book
the posterior part of a human (or animal) body from the neck to the end of the spine
the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
the part of something that is furthest from the normal viewer
(football) a person who plays in the backfield

back (adjective)	go (adjective)
related to or located at the back	functioning correctly and ready for action
of an earlier date
located at or near the back of an animal

back (verb)	go (verb)
establish as valid or genuine	pass from physical life and lose all bodily attributes and functions necessary to sustain life
strengthen by providing with a back or backing	follow a certain course
shift to a counterclockwise direction	progress by being changed
place a bet on	stop operating or functioning
travel backward	enter or assume a certain state or condition
cause to travel backward	be abolished or discarded
support financial backing for	give support (to) or make a choice (of) one out of a group or number
be behind; approve of	have a turn; make one's move in a game
give support or one's approval to	to be spent or finished
be in back of	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

back (adverb)	go (adverb)
at or to or toward the back or rear
in or to or toward a past time
in repayment or retaliation
in or to or toward a former location
in or to or toward an original condition
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