The term 'SIDE IN A DEBATE' can be broken down into three crossword solutions: ANTIS (5 letters), ANTI (4 letters), and NAYS (4 letters). ANTIS is a plural form of the word 'ANTI, ' which means 'opposing or hostile to a particular practice, person, or group.' ANTI is a singular form of the same word. NAYS is a plural form of the word 'NAY, ' which means 'a vote or opinion against something.' Therefore, the term 'SIDE IN A DEBATE' can be defined as two opposing sides, one being 'ANTI' and the other being 'NAY.'