a conflict carried on by force of arms, as between nations or between parties within a nation; warfare, as by land, sea, or air.

a state or period of armed hostility or active military operations

The two nations were at war with each other.

a contest carried on by force of arms, as in a series of battles or campaigns

the War of 1812.

active hostility or contention; conflict; contest

a war of words.

aggressive business conflict, as through severe price cutting in the same industry or any other means of undermining competitors

a fare war among airlines; a trade war between nations.

a struggle

a war for men's minds; a war against poverty.

armed fighting, as a science, profession, activity, or art; methods or principles of waging armed conflict

War is the soldier's business.

Cards .

a game for two or more persons, played with a 52-card pack evenly divided between the players, in which each player turns up one card at a time with the higher card taking the lower, and in which, when both turned up cards match, each player lays one card face down and turns up another, the player with the higher card of the second turn taking all the cards laid down.

an occasion in this game when both turned up cards match.

Archaic . a battle.

to make or carry on war; fight

to war with a neighboring nation.

to carry on active hostility or contention

Throughout her life she warred with sin and corruption.

to be in conflict or in a state of strong opposition

The temptation warred with his conscience.

of, belonging to, used in, or due to war

war preparations; war hysteria.

noun

ceasefire , peace

verb

agree , ceasefire , make peace

noun

battle , bloodshed , cold war , combat , conflict , contention , contest , enmity , fighting , hostilities , hostility , police action , strife , strike , struggle , warfare , corrivalry , race , rivalry , striving , tug of war , belligerency , confrontation , clash , difference , difficulty , disaccord , discord , discordance , dissension , dissent , dissentience , dissidence , dissonance , faction , friction , inharmony , schism , variance , armageddon , belligerence , carnage , casus belli , crusade , holocaust

verb

attack , attempt , bombard , campaign against , challenge , clash , combat , contend , contest , differ , disagree , endeavor , engage in combat , go to war , kill , make war , march against , meet , murder , oppugn , shell , shoot , strive , struggle , take on , take the field against , take up arms , tug , wage war , battle , duel , fight , tilt , wrestle , blitzkrieg , conflict , crusade , feud , jihad , martial , militate , mobilize , strife