The term 'Do Perfectly' can be represented by two words in a crossword puzzle, 'ACE' and 'NAIL'. The word 'ACE' is a verb meaning to do something perfectly or to achieve success. It is derived from the Old French word 'asser', which means to do something well. The word 'NAIL' is also a verb meaning to do something perfectly or to get something right. It is derived from the Old English word 'naegl', which means to fasten or secure something. Together, these two words represent the idea of doing something perfectly.