argue (v) 言い争う = exchange or express diverging or opposite views, typically in a heated or angry way. - - I wasn't going to argue with a gun.

brawl (n) 乱闘、けんか = a rough or noisy fight or quarrel. - - He'd got into a drunken brawl in a bar. 

(v) fight or quarrel in a rough or noisy way. - - He ended up brawling with a lout outside his house.

brutality (n) 残虐 = savage physical violence; great cruelty. - - Brutality against civilians.   

compete (v) 競う = strive to gain or win something by defeating or establishing superiority over others who are trying to do the same. - - Universities are competing for applicants.

contend (v) 争う = struggle to surmount (a difficulty or danger).- - She had to contend with his uncertain temper.  

cruelty (n) 残酷 = callous indifference to or pleasure in causing pain and suffering. - - He has treated her with extreme cruelty. 

dispute (v) 論争する = argue about (something); discuss heatedly. - - He taught and disputed with local poets.彼は地元の詩人を教えたり論争したりした。

fight (v) 戦う = take part in a violent struggle involving the exchange of physical blows or the use of weapons. - - The men were fighting.

ferocious (a) 凶暴な= savagely fierce, cruel, or violent. - - The wolverine is nature's most ferocious and violent animal. 

melee (n) 近接攻撃 = a confused fight, skirmish, or scuffle. - - Several people were hurt in the melee. 
quarrel (n) 口論 = a heated argument or disagreement, typically about a trivial issue and between people who are usually on good term. - - She made the mistake of picking a quarrel with John.  (v) 口論する 

savagery (n) 野蛮 = the quality of being fierce or cruel. - - A crime of the utmost savagery. 

scuffle (v) 乱闘、揉み合い = a short, confused fight or struggle at close quarters.
there were minor scuffles with police. (v) もみ合う = engage in a short, confused fight or struggle at close quarters. - - The teacher noticed two students scuffling in the corridor.

skermish (n) 小競り合い = an episode of irregular or unpremeditated fighting, especially between small or outlying parts of armies or fleets. - - The unit was caught in several skirmishes and the commanding officer was killed. 部隊はいくつかの小競り合いに巻き込まれ、指揮官が死亡した  (v) engage in a skirmish. - - The two powers have fought three major wars and have skirmished continually.

struggle (n) 争い = a forceful or violent effort to get free of restraint or resist attack. - - There were signs of a struggle and there was a lot of blood around. 争いの痕跡があり、周囲には大量の血が流れていた  (v) もがく= make forceful or violent efforts to get free of restraint or constriction. - - Before she could struggle, he lifted her up. 彼女がもがく前に、彼は彼女を抱き上げた

tussle (n) 争い = a vigorous struggle or scuffle, typically in order to obtain or achieve something. - - There was a tussle for the ball.

violence (v) 暴力 = behavior involving physical force intended to hurt, damage, or kill someone or something.