Nouns

(n)retreat(military) withdrawal of troops to a more favorable position to escape the enemy's superior forces or after a defeat“the disorderly retreat of French troops”
(n)retreata place of privacy; a place affording peace and quiet
(n)retreat(military) a signal to begin a withdrawal from a dangerous position
(n)retreat(military) a bugle call signaling the lowering of the flag at sunset
(n)hideaway, retreatan area where you can be alone
(n)retirement, retreatwithdrawal for prayer and study and meditation“the religious retreat is a form of vacation activity”
(n)retreatthe act of withdrawing or going backward (especially to escape something hazardous or unpleasant)

Verbs

(v)withdraw, retreat, pull away, draw back, recede, pull back, retire, move backpull back or move away or backward“The enemy withdrew”, “The limo pulled away from the curb”
(v)retreatmove away, as for privacy“The Pope retreats to Castelgondolfo every summer”
(v)retrograde, retreatmove back“The glacier retrogrades”
(v)retreat, pull back, back out, back away, crawfish, crawfish out, pull in one's horns, withdrawmake a retreat from an earlier commitment or activity“We'll have to crawfish out from meeting with him”, “He backed out of his earlier promise”, “The aggressive investment company pulled in its horns”