WordNet sense 1 (the unwanted discharge of a fluid from some container):

leak, leakage, outflow

WordNet sense 2 (a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level):

safety valve, escape cock, escape valve, relief valve

WordNet sense 3 (be incomprehensible to; escape understanding by):

elude

WordNet sense 4 (remove oneself from a familiar environment, usually for pleasure or diversion):

get away

WordNet sense 5 (flee; take to one's heels; cut and run):

bunk, lam, run, scarper, run away, fly the coop, head for the hills, hightail it, take to the woods, turn tail

WordNet sense 6 (run away from confinement):

break loose

WordNet sense 7 (escape potentially unpleasant consequences; get away with a forbidden action):

get off, get by, get out

WordNet sense 8 (fail to experience):

miss

WordNet sense 9 (nonperformance of something distasteful (as by deceit or trickery) that you are supposed to do):

evasion, dodging

WordNet sense 10 (an inclination to retreat from unpleasant realities through diversion or fantasy):

escapism

WordNet sense 11 (the act of escaping physically):

flight