The term PREPARES TO TAKE OFF can be solved by two crossword solutions: TAXIES (6 letters) and TAXIS (5 letters). TAXIES is a verb meaning to move slowly on the ground, usually referring to an aircraft. TAXIS is a noun referring to a vehicle used for public transportation, typically a car or van. Both words are related to the idea of preparing to take off, as they refer to the act of moving slowly on the ground in order to reach a destination.