strife 
(str
īf)
n.1. Heated, often violent conflict or disagreement. See Synonyms at conflict.
2. A conflict or quarrel: "His mind seemed older than theirs: it shone coldly on their strifes and happiness and regrets like a moon upon a younger earth" (James Joyce).
3. Contention or competition between rivals.
[Middle English strif, from Old French estrit, estrif, from Frankish *strīd.]