Conflict
Part of speech: noun
Definition: A clash or disagreement, often violent, between two opposing groups or individuals. An incompatibility, as of two things that cannot be simultaneously fulfilled.
Part of speech: verb
Definition: To be at odds (with); to disagree or be incompatible To overlap (with), as in a schedule.
Crisis
Part of speech: noun
Definition: A crucial or decisive point or situation; a turning point.An unstable situation, in political, social, economic or military affairs, especially one involving an impending abrupt change.A sudden change in the course of a disease, usually at which the patient is expected to recover or die.A traumatic or stressful change in a person's life.A point in a drama at which a conflict reaches a peak before being resolved.