Sex appeal is a term used to describe the attractiveness of a person, usually based on physical characteristics. OOMPH, with five letters, is a slang term for sex appeal, referring to a certain charisma or magnetism that someone has. ALLURE, with six letters, is another word for charm or attraction, and can be used to describe sex appeal. HOTNESS, with seven letters, is a term used to describe someone who is sexually attractive. Animal magnetism, with fifteen letters, is an old-fashioned phrase used to describe a powerful sexual attraction.