noun
someone who shares your feelings or opinions and hopes that you will be successful
• Syn: ↑sympathizer, ↑sympathiser
• Derivationally related forms: ↑sympathise (for: ↑sympathiser), ↑sympathize (for: ↑sympathizer)
• Hyponyms: ↑bleeding heart, ↑fellow traveler, ↑fellow traveller
Useful english dictionary. 2012.