combat

[1]	battle
[2]	fight , (do) battle , war , clash , contend , duel , joust , wrestle , come to blows , spar , grapple (with)
[3]	fight , struggle/strive against , contest , oppose , defy , enter the lists against , withstand

[1]	fight , armed combat , encounter , engagement , duel , battle , conflict , war , warfare , skirmish
[2]	struggle , fight , fighting , contest , strife , scrap , controversy , dispute , quarrel , disagreement , altercation , vendetta , feud
[3]	opposition , difference , confrontation
[4]	action , fighting , battle , war