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Synonyms for Harm (same or very similar meaning)

WordNet sense 1 (any physical damage to the body caused by violence or accident or fracture etc.):
hurt, injury, trauma

WordNet sense 2 (the occurrence of a change for the worse):
damage, impairment

WordNet sense 3 (the act of damaging something or someone):
scathe


From the ODE community, based on WordNetadd/edit