opposer
[noun]
Synonyms: opponent, adversary, antagonist, anti, con, match, oppugnant

[TahlilGaran] English Synonym Dictionary ▲

opposer noun. [ǝ'pǝʊzǝ] L15.
[from OPPOSE + -ER¹.]
1. A person who checks accounts. Cf. OPPOSE 3. Only in L15.

2. a. A person who opposes the defender of a thesis in an academic disputation. Cf. OPPOSE 2, OPPONENT noun 1. obsolete exc. Hist. L15.
b. Either of two examiners formerly appointed to carry out at Winchester College the elections to New College, Oxford. rare. L19.

3. A person who opposes or contends against a person, measure, system, etc. E17.

[TahlilGaran] English Dictionary ▲