sympathizer

/ˈsɪmpəˌθaɪzər/
noun
  1. A person who agrees with or supports a particular idea, group, or cause, often without being an official member.
    • She was known as a quiet sympathizer of the environmental movement.
    • Police arrested several suspected sympathizers of the extremist group.
    • The rebels relied on local sympathizers for food and shelter.
  2. A person who feels pity or sorrow for someone else's suffering.
    • The charity event drew sympathizers from all over the city.
    • After the accident, many sympathizers sent cards and flowers.
    • He was a natural sympathizer, always ready to listen to a friend in trouble.
Antonyms
What does "sympathizer" mean? | whatsthatwordmean | whatsthatwordmean