inmate vs. prisoner

noun

  1. a person who is confined in a prison, hospital, etc.

  2. Archaic.,  a person who dwells with others in the same house.

noun

  1. a person who is confined in prison or kept in custody, especially as the result of legal process.

  2. prisoner of war.

  3. a person or thing that is deprived of liberty or kept in restraint.