outgallop

From out- +‎ gallop.

outgallop (third-person singular simple present outgallops, present participle outgalloping, simple past and past participle outgalloped)

1. (transitive, especially of horses or riders) To run faster than; to outdistance.
   • 1869, Leo Tolstoy, War and Peace, trans. Louise and Aylmer Maude, ch. 14,

     He had lately procured himself a large, fine, mettlesome, Donets horse, dun-colored, with light mane and tail, and when he rode it no one could outgallop him.

• Oxford English Dictionary, 2nd ed., 1989.
• Random House Webster's Unabridged Electronic Dictionary, 1987-1996.