a person who willingly suffers death rather than renounce his or her religion.

a person who is put to death or endures great suffering on behalf of any belief, principle, or cause

a martyr to the cause of social justice.

a person who undergoes severe or constant suffering

a martyr to severe headaches.

a person who seeks sympathy or attention by feigning or exaggerating pain, deprivation, etc.

to make a martyr of, esp. by putting to death.

to torment or torture.

noun

persecute , sacrifice , saint , sufferer , torment , victim