turn tail vs go away

turn tail and go away both are verbs.

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

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

Other hypernyms of turn tail include go forth, leave.

turn tail (verb)	go away (verb)
flee; take to one's heels; cut and run	get lost, as without warning or explanation
	go away from a place
	move away from a place into another direction
	become invisible or unnoticeable