The term 'A Familiar Term of Address for a Man' can be expressed in three different ways: KIDDO (5 letters), SIR (3 letters), and SIRE (4 letters). KIDDO is an informal term of endearment, typically used to address a young boy or girl. SIR is a formal title of respect, usually used when addressing a man of higher social standing. SIRE is an archaic term of address, typically used to refer to a king or other nobleman.