pull back vs pull away

pull back and pull away both are verbs.

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

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

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

pull back (verb)	pull away (verb)
make a retreat from an earlier commitment or activity	pull back or move away or backward
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