go vs go away

go is a noun but go away is not a noun.

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

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

Other hypernyms of go include disappear, vanish.

As verbs, go and go away are synonyms defined as:

Other synonyms of go include depart.

go (noun)	go away (noun)
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 usually brief attempt
street names for methylenedioxymethamphetamine
a time period for working (after which you will be relieved by someone else)

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

go (verb)	go away (verb)
pass from physical life and lose all bodily attributes and functions necessary to sustain life	get lost, as without warning or explanation
follow a certain course	go away from a place
progress by being changed	move away from a place into another direction
stop operating or functioning	become invisible or unnoticeable
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