"belligerent" in the noun sense
1. combatant, battler, belligerent, fighter, scrapper
someone who fights (or is fighting)
"belligerent" in the adjective sense
1. aggressive, belligerent
characteristic of an enemy or one eager to fight
"aggressive acts against another country"
"a belligerent tone"
2. belligerent, militant, war-ridden, warring
engaged in war
"belligerent (or warring) nations"
Source: WordNet® (An amazing lexical database of English)
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