(KON-flict): A serious disagreement. A conflict can also be a period of fighting.

inter-human conflicts consist of disagreements between two or more parties that have the potential to inflict harm upon one, both, or all of the parties involved.

a disagreement or argument about something important; "he had a dispute with his wife"; "there were irreconcilable differences"; "the familiar conflict between Republicans and Democrats"

a fight or quarrel

Irreconcilability of motives, ways of behaving and dealing with others; conflict can be either intra- or interpersonal.

argument, dispute, warfare