Clash
WordNet
noun
(1) A minor short-term fight
(2) A loud resonant repeating noise
"He could hear the clang of distant bells"
(3) A state of conflict between persons
(4) A state of conflict between colors
"Her dress was a disturbing clash of colors"
verb
(5) Disagree violently
"We clashed over the new farm policies"
(6) Crash together with violent impact
"The cars collided"
"Two meteors clashed"
(7) Be incompatible; be or come into conflict
"These colors clash"