retreat vs withdraw

retreat is a noun but withdraw is not a noun.

Word	Noun	Adjective	Verb	Adverb
retreat	Yes	No	Yes	No
withdraw	No	No	Yes	No

As verbs, retreat and withdraw are synonyms defined as:

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

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

As verbs, retreat and withdraw are synonyms defined as:

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

As verbs, withdraw is a hypernym of retreat; that is, withdraw is a word with a broader meaning than retreat:

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

retreat (noun)	withdraw (noun)
(military) withdrawal of troops to a more favorable position to escape the enemy's superior forces or after a defeat
withdrawal for prayer and study and meditation
the act of withdrawing or going backward (especially to escape something hazardous or unpleasant)
an area where you can be alone
(military) a bugle call signaling the lowering of the flag at sunset
(military) a signal to begin a withdrawal from a dangerous position
a place of privacy; a place affording peace and quiet

retreat (verb)	withdraw (verb)
make a retreat from an earlier commitment or activity	keep away from others
pull back or move away or backward	remove something concrete, as by lifting, pushing, or taking off, or remove something abstract
move back	make a retreat from an earlier commitment or activity
move away, as for privacy	take back what one has said
	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