- also-ran
- little chance
- little opportunity
- long-shot
- outside-chance
- outside shot
- poor bet
- poor lookout
- poor possibility
- poor prognosis
- poor prospect
- remote possibility
- sleeper
- slim chance
- small chance
- stalking-horse
- underdog
- unexpected winner
- unknown
- unknown-quantity
- unlikelihood
- unlikely winner
- upsetter
Words near Dark-horse in the Thesaurus