war

[1]	do battle/fight/struggle/(engage in) combat with/against , make/wage war with/against , take up arms/strive/campaign/tilt against , cross swords/contend/joust with

[1]	warfare , warfare , combat , conflict , fighting , clash , hostilities , battle , struggle , engagement , encounter , strife , contention
[2]	at war , state of war , fighting , battling , in combat , in conflict , in disagreement , in dispute , in contention , struggling , antagonistic , at daggers drawn
[3]	warfare