The term 'Range of Understanding' can be summarized by three crossword solutions: PURVIEW (7 letters), REACH (5 letters), and KEN (3 letters). PURVIEW refers to the scope or extent of one's knowledge or authority, while REACH is defined as the limit of one's ability or capacity. KEN, on the other hand, is a Scottish word meaning 'to know or understand'. All three words are related to the concept of understanding, and together they provide a comprehensive range of understanding.