Wordnet 3.0
NOUN (1)
1. 
 a disagreement or argument about something important; 
- Example: "he had a dispute with his wife"- Example: "there were irreconcilable differences"- Example: "the familiar conflict between Republicans and Democrats"[syn: dispute, difference, difference of opinion, conflict]
WordNet (r) 3.0 (2006):
difference of opinion
    n 1: a disagreement or argument about something important; "he
         had a dispute with his wife"; "there were irreconcilable
         differences"; "the familiar conflict between Republicans
         and Democrats" [syn: dispute, difference, difference
         of opinion, conflict]