Complementing and Clashing

verb

• Crash together with violent impact.
  • usage: "The cars collided"; "Two meteors clashed"
  • synonyms: collide, clash
• Be incompatible; be or come into conflict.
  • usage: "These colors clash"
  • synonyms: clash, jar, collide
• Disagree violently.
  • usage: "We clashed over the new farm policies"
  • synonyms: clash

adjective

• Sharply and harshly discordant.
  • usage: "clashing interests of loggers and conservationists"; "clashing colors"