SynonymDefinitionAntonym.com - English Synonym Dictionary

An open clash between two opposing groups (or individuals)

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

An incompatibility of dates or events

A disagreement or argument about something important

Opposition between two simultaneous but incompatible feelings

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

A state of opposition between persons or ideas or interests

Go against, as of rules and laws

Be in conflict