The term MAN'S TITLE can be summarized by two crossword solutions: SIR (3 letters) and MISTER (6 letters). SIR is a title of respect used before a man's given name, typically in the United Kingdom. It is also used as a title of respect for a knight. MISTER is an English language honorific for men, which is used with the last name or full name of a man. It is also used as a title of respect for a man who has no other title.