Synonyms for gentleman

noun

1. A courteous and honorable man

   man of honor, refined man, man of his word, polished man, perfect gentleman, cavalier, sir, don, Sir Galahad, gentleman and a scholar*, brick*, trump*.

   Antonyms boor*, sneak, cad.

2. A well-born person

   nobleman, patrician, man of breeding; see aristocrat, lord 2.