Answer:
verb (used without object)
1. to come into collision or disagreement; be contradictory, at variance, or in opposition; clash:
2. to fight or contend; do battle.
noun
3. a fight, battle, or struggle, especially a prolonged struggle; strife.
controversy; quarrel:
4. discord of action, feeling, or effect; antagonism or opposition, as of interests or principles:
5. a striking together; collision.