dark horse
7 synonyms and 2 antonyms for dark horse, grouped by meaning and by how common each one is.
Noun — A competitor, candidate or contestant who is little known or thought unlikely to win, but who may surprise everyone by succeeding.
Synonyms
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Synonyms by Meaning
1. noun
A competitor, candidate or contestant who is little known or thought unlikely to win, but who may surprise everyone by succeeding.
“She started the leadership race as a dark horse and finished it as prime minister.”
Opposites
2. noun informal
A person who keeps their talents, plans or private life quiet, so that others are surprised when the truth comes out.
“You're a dark horse — nobody knew you'd written a novel.”
How to use dark horse
The word patterns that sound natural to a native speaker.
Neutral to informal; common in sport, politics and business writing, and fine in newspaper prose.
Etymology
Originally an allusion to an unknown horse with a dark coat winning a race, as used in the 1831 novel The Young Duke by Benjamin Disraeli (1804–1881).
Full origin of dark horse →