Blue Blood is a term used to describe people of NOBLE or aristocratic birth. It is derived from the Spanish phrase 'sangre azul', which literally translates to 'blue blood'. The term is often used to refer to members of the upper class, who are typically wealthy and have a long history of privilege and power. ARISTOCRAT (10 letters) and NOBLE (5 letters) are two words that can be used to describe someone with blue blood.