The term 'state of being alone' can be summarized by two crossword solutions: SOLITUDE (8 letters) and LONELY (6 letters). SOLITUDE is defined as a state of seclusion or isolation, while LONELY is defined as feeling sad due to lack of companionship or communication with others. Both words describe the same concept, but from different perspectives. SOLITUDE implies a physical separation from others, while loneliness implies an emotional separation.