The term 'CALL ALTERNATIVE' can be broken down into two crossword solutions: EMAIL (5 letters) and RAISE (5 letters). EMAIL is a form of communication that allows users to send messages electronically over the internet. It is a popular alternative to traditional methods of communication such as telephone calls or face-to-face meetings. RAISE is an increase in salary or wages, usually given to employees as a reward for good performance or to keep them motivated. It is an alternative to other forms of compensation such as bonuses or stock options.