1) Absquatulated 2) Amscrayed 3) Beat it 4) Bolted 5) Bugged out 6) Cleared out 7) Cut and run 8) Cut out 9) Decamped 10) Departed quickly 11) Escaped 12) Exhibited extreme fear 13) Exited expeditiously 14) Exited quickly 15) Fellow went ahead and bolted 16) Flew the coop 17) Forsook 18) Got away in a hurry Found on https://www.crosswordclues.com/clue/fled