renegade

Adjective

• having deserted a cause or principle
  • some provinces had proved recreant
    
  • renegade supporters of the usurper
    

Noun

• a disloyal person who betrays or deserts his cause or religion or political party or friend etc.

• someone who rebels and becomes an outlaw

Verb

• break with established customs

Related words

• Synonyms: 
  recreant , deserter , apostate , turncoat , ratter , rebel