The term 'to the nth degree' is used to describe something that has been done to the highest possible level or extent. The crossword solutions for this term are 'FULLY' (5 letters), 'royally' (7 letters), 'UTTERLY' (7 letters), 'TOTALLY' (7 letters), 'in spades' (8 letters), 'EXTREMELY' (9 letters), and 'like crazy' (9 letters). All of these words indicate that something has been done to the utmost level, with no room for improvement.