the process of military struggle between two nations or groups of nations; war.

armed conflict between two massed enemies, armies, or the like.

conflict, esp. when vicious and unrelenting, between competitors, political rivals, etc.

noun

harmony , peace

noun

armed struggle , arms , battle , blows , campaigning , clash , combat , competition , contest , counterinsurgency , discord , emulation , fighting , hostilities , military operation , passage of arms , rivalry , strategy , strife , striving , struggle , tug-of-war , war , corrivalry , race , tug of war , belligerency , confrontation , hostility , contention , difference , difficulty , disaccord , discordance , dissension , dissent , dissentience , dissidence , dissonance , faction , friction , inharmony , schism , variance , conflict , crusade , militancy