The term 'male parent' can be described by three different words: SIRE (4 letters), FATHER (6 letters), and POP (3 letters). SIRE is an archaic word used to refer to a male ancestor, especially the founder of a family or line. FATHER is the most commonly used term for a male parent, and is used to refer to a man in relation to his child or children. POP is a slang term for FATHER, and is often used as an affectionate nickname.