pull away vs pull back

pull away and pull back both are verbs.

Word	Noun	Adjective	Verb	Adverb
pull away	No	No	Yes	No
pull back	No	No	Yes	No

As verbs, pull away and pull back are synonyms defined as:

Other synonyms of pull away include draw back, move back, recede, retire, retreat, withdraw.

pull away (verb)	pull back (verb)
pull back or move away or backward	make a retreat from an earlier commitment or activity
	move to a rearward position; pull towards the back
	stretch back a bowstring (on an archer's bow)
	use a surgical instrument to hold open (the edges of a wound or an organ)
	pull back or move away or backward