Reverse Dictionary: ADVERSARY

NOUNS, PERSON
1435 — GAINSAYER an adversary; one who speaks against or opposes; an opponent 
1567 — COPEMATE — COPESMATE a person with whom one copes or contends; an adversary, an antagonist → obs.
1850 — ADVERSE an adversary 
1891 — ANOTHER RICHMOND IN THE FIELD another unexpected adversary → (Bk.)
1939 — SOUR GRAPE an adversary; an enemy → Amer. dial.