The term 'No Extras' can be described by two crossword solutions: 'PLAIN' (5 letters) and 'Barebones' (9 letters). Both words refer to something that is basic and without any additional features or components. PLAIN is often used to describe something that is simple and unadorned, while Barebones is a more extreme version of this concept, referring to something that is stripped down to its most essential elements.