The term 'oratorical skill' refers to the ability to speak in a persuasive and eloquent manner. This is often referred to as RHETORIC, which is an 8-letter word that can be used to describe this skill. RHETORIC is the art of using language effectively and persuasively in order to influence an audience. It involves the use of language to create an emotional response in the listener, as well as the use of persuasive techniques to convince them of a particular point of view.