clash in WordNet English dictionary

1. a minor short-term fight
   brush  clash  encounter  skirmish 
   
2. a loud resonant repeating noise
   "he could hear the clang of distant bells"
   clang  clangor  clangour  clangoring  clank  clash  crash 
   
3. a state of conflict between persons
   clash  friction 
   
4. a state of conflict between colors
   "her dress was a disturbing clash of colors"
   clash 
   

1. disagree violently
   "We clashed over the new farm policies"
   clash 
   
2. crash together with violent impact
   "The cars collided"; "Two meteors clashed"
   collide  clash 
   
3. be incompatible; be or come into conflict
   "These colors clash"
   clash  jar  collide