conflict - noun

an open clash between two opposing groups (or individuals)

opposition between two simultaneous but incompatible feelings

a hostile meeting of opposing military forces in the course of a war

a state of opposition between persons or ideas or interests

an incompatibility of dates or events

opposition in a work of drama or fiction between characters or forces (especially an opposition that motivates the development of the plot)

a disagreement or argument about something important

conflict - verb

• be in conflict
• go against, as of rules and laws

conflict - thesaurus

battle   contravene   difference   dispute   engagement   fight   infringe   struggle