warrior
noun /ˈwɒriə(r)/
  /ˈwɔːriər/
(formal)- (especially in the past) a person who fights in a battle or war
- a warrior nation (= whose people are skilled in fighting)
 - a Zulu warrior
 
Extra Examples- He saved his fellow warrior.
 - He views himself as a holy warrior.
 - the armchair warriors at the Department of Defense
 - the graves of the fallen warriors
 - the last of the ancient warriors
 - A Viking warrior would be buried with his weapons: usually his sword, spear, shield and battleaxe.
 
Oxford Collocations Dictionaryadjective- fearless
 - fierce
 - formidable
 - …
 
- band
 
- fight
 
 - (in compounds) (often disapproving) a person who leads or takes part in a campaign for a political or social cause, especially in an aggressive way that other people think is bad 
- These social justice warriors want to apply their politically correct standards and rules to others' speech.
 
 
Word OriginMiddle English: from Old Northern French werreior, variant of Old French guerreior, from guerreier ‘make war’, from guerre ‘war’.