noun
BAD : He ran away from home after a discussion with his father.
GOOD : He ran away from home after an argument with his father.
BAD : They had a discussion and Dusty killed him.
GOOD : They had an argument and Dusty killed him.
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discussion = a talk about something, especially one which allows different points of view to be expressed: 'After further discussion, the government has decided to reject the American offer.'
argument = a quarrel or disagreement: 'The couple next door are always having arguments.' 'I hate arguments. They upset me.'