The term 'purely academic' can be described by two crossword solutions: 'MOOT' and 'quodlibetic'. MOOT is a 4-letter word meaning 'open to debate; having no practical significance'. Quodlibetic is an 11-letter word meaning 'pertaining to the discussion of subtle or difficult points of learning'. Both words refer to topics that are purely academic in nature, as they are not necessarily applicable to real-world situations.