sneak away vs go away

sneak away and go away both are verbs.

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

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

Other hypernyms of sneak away include go forth, leave.

sneak away (verb)	go away (verb)
leave furtively and stealthily	get lost, as without warning or explanation
	go away from a place
	move away from a place into another direction
	become invisible or unnoticeable