Combat
WordNet
noun
(1) An engagement fought between two military forces
(2) The act of fighting; any contest or struggle
"A fight broke out at the hockey game"
"There was fighting in the streets"
"The unhappy couple got into a terrible scrap"
verb
(3) Battle or contend against in or as if in a battle
"The Kurds are combating Iraqi troops in Northern Iraq"
"We must combat the prejudices against other races"
"They battled over the budget"