The term 'REALLY IRRITATES' can be broken down into three crossword solutions: RANKLES (7 letters), GALLS (5 letters), and NETTLES (7 letters). All three words refer to a feeling of annoyance or anger caused by something that has been done or said. RANKLES is used to describe a feeling of deep resentment, GALLS is used to describe a feeling of being insulted or offended, and NETTLES is used to describe a feeling of being provoked or irritated. Together, these three words provide a comprehensive description of the term 'REALLY IRRITATES'.