PENITENTIARY /ˌpɛnɪˈtɛnʃəɹi/ Scrabble 17 Words With Friends 19 Definition noun a correctional institution for those convicted of major crimes. — synonyms: pen adjective used for punishment or reform of criminals or wrongdoers. adjective showing or constituting penance. — synonyms: penitential See all 475 words you can make from PENITENTIARY → 12-letter words Words starting with P Words ending with Y ← Unscramble different letters