7
long shot(noun, possibility)
5
underdog(noun, struggle, possibility, winner)
4
enigma
4
hundred-to-one shot(noun, possibility)
4
poor possibility(noun, possibility)
3
unknown(noun, possibility)
3
candidate(noun, match, opposition, rival, enemy)
3
warrior(competitor, participant, candidate, contender)
2
aspirant(noun, opposition, job, rival, enemy)
2
entrant(noun, opposition, job, rival, enemy)
2
favorite son
2
hopeful(job, competitor, participant, runner, candidate)
2
improbability(noun, possibility)
2
little chance(noun, possibility)
2
little opportunity(noun, possibility)
2
outside chance(noun, possibility)
2
poor prospect(noun, possibility)
2
slim chance(noun, possibility)
2
small chance(noun, possibility)
1
riddle
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APASmart Define. (2016). dark horse thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/dark_horse/thesaurus/synonyms
ChicagoSmart Define. 2016. "dark horse thesaurus" https://smartdefine.org/dark_horse/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, dark horse thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/dark_horse/thesaurus/synonyms>.
MLASmart Define. "dark horse thesaurus" 1 April 2016. Web. 22 September 2026. <https://smartdefine.org/dark_horse/thesaurus/synonyms>