conflict, discord

STRIFE
WordClue
WARconflict, collision
FIGHTconflict, combat
BATTLEconflict, collision
COMBATconflict, struggle
CONFLICTstrife, discord
STRUGGLEconflict, contention
VARIANCEdiscrepancy, conflict
ENCOUNTERconflict, fight
CONTENTIONstrife, conflict
STRUGGLEconflict, contention
ENCOUNTERconflict, fight