The term 'head-over-heels' can be represented by four crossword solutions: GAGA (4 letters), AGOG (4 letters), ENAMORED (8 letters), and CAPONE (6 letters). GAGA is an expression of excitement or enthusiasm, while AGOG is an adjective meaning highly excited or eager. ENAMORED is an adjective meaning to be deeply in love with someone or something, and CAPONE is a reference to the infamous American gangster Al Capone. Together, these words represent the phrase 'head-over-heels, ' which is used to describe someone who is deeply in love or very enthusiastic about something.