plural of opposer

(childish) A contrived holiday on which everything is done backwards, for example "yes" means "no".

(informal, idiomatic) The United States.

(politics) Negative information retrieved about a candidate's opponent in an election for use in campaigning.

Not to be effectually opposed; irresistible.

(idiomatic) A person who holds a position in an organization that corresponds to that held by another person in another organization; a counterpart

A period of time in which suitable action can achieve success.

plural of window of opportunity

the state or condition of being opportune

A side, party (e.g. a team or armed force) seen as adversary, enemy etc. opposite one (or more) other(s), as in a battle or team sports competition.