pull back vs withdraw

pull back and withdraw both are verbs.

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

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

pull back and withdraw: make a retreat from an earlier commitment or activity

Other synonyms of pull back include back away, back out, crawfish, crawfish out, pull in one's horns, retreat.

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

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

pull back (verb)	withdraw (verb)
make a retreat from an earlier commitment or activity	keep away from others
move to a rearward position; pull towards the back	remove something concrete, as by lifting, pushing, or taking off, or remove something abstract
stretch back a bowstring (on an archer's bow)	make a retreat from an earlier commitment or activity
use a surgical instrument to hold open (the edges of a wound or an organ)	take back what one has said
pull back or move away or backward	release from something that holds fast, connects, or entangles
	lose interest
	pull back or move away or backward
	remove (a commodity) from (a supply source)
	cause to be returned
	break from a meeting or gathering
	withdraw from active participation
	retire gracefully