WordNet sense 1 (grant relief or an exemption from a rule or requirement to):

exempt, free

WordNet sense 2 (save from ruin, destruction, or harm):

salvage, salve, save, salve

WordNet sense 3 (free someone temporarily from his or her obligations):

take over

WordNet sense 4 (lessen the intensity of or calm):

allay, ease, still

WordNet sense 5 (relieve oneself of troubling information):

unbosom

WordNet sense 6 (grant exemption or release to):

excuse, excuse, let off

WordNet sense 7 (alleviate or remove (pressure or stress) or make less oppressive):

lighten

WordNet sense 8 (provide relief for):

remedy

WordNet sense 9 (provide physical relief, as from pain):

alleviate, assuage, palliate