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Synonyms for Free (same or very similar meaning)

WordNet sense 1 (people who are free):
free people

WordNet sense 2 (grant relief or an exemption from a rule or requirement to):
exempt, relieve

WordNet sense 3 (make (information) available publication):
release, release

WordNet sense 4 (free from obligations or duties):
discharge, discharge

WordNet sense 5 (grant freedom to; free from confinement):
liberate, unloose, unloosen

WordNet sense 6 (relieve from):
rid, disembarrass

WordNet sense 7 (part with a possession or right):
relinquish, resign, resign, give up

WordNet sense 8 (costing nothing):
complimentary, gratis, gratuitous, costless

WordNet sense 9 (not paid):
unpaid

WordNet sense 10 (not taken up by scheduled activities):
spare

WordNet sense 11 (remove or force out from a position):
dislodge

WordNet sense 12 (free or remove obstruction from):
disengage

WordNet sense 13 (born free of free parents):
freeborn

WordNet sense 14 (freed from bondage):
emancipated, liberated

WordNet sense 15 (free from constraint):
unconstrained

WordNet sense 16 (free from confinement or physical restraint):
unconfined

WordNet sense 17 (not restrained or confined or attached):
loose

WordNet sense 18 (free from contact or proximity or connection):
clear

WordNet sense 19 (not busy; not otherwise committed):
available

WordNet sense 20 ((of political bodies) not controlled by outside forces):
autonomous, independent, sovereign

WordNet sense 21 (having escaped, especially from confinement):
escaped

WordNet sense 22 (not fixed in position):
detached

WordNet sense 23 (not firmly placed or set or fastened):
unfixed

WordNet sense 24 (not held in chemical or physical combination):
unbound

WordNet sense 25 (not literal):
liberal

WordNet sense 26 (not exact):
inexact

WordNet sense 27 (let off the hook):
absolve, justify

WordNet sense 28 (make (assets) available):
unblock, unfreeze


From the ODE community, based on WordNetadd/edit