convict vs offender

convict

noun
  • A person convicted of a crime by a judicial body. 

  • The convict cichlid (Amatitlania nigrofasciata), also known as the zebra cichlid, a popular aquarium fish, with stripes that resemble a prison uniform. 

  • A person deported to a penal colony. 

  • A common name for the sheepshead (Archosargus probatocephalus), owing to its black and gray stripes. 

verb
  • To find guilty, as a result of legal proceedings, or (informal) in a moral sense. 

  • To convince, persuade; to cause (someone) to believe in (something). 

offender

noun
  • A person who commits an offense against the law, a lawbreaker. 

  • One who gives or causes offense, or does something wrong. 

How often have the words convict and offender occurred in a corpus of books? (source: Google Ngram Viewer )