The Qenya Lexicon of the 1910s had a verb ᴱQ. lopo- “gallop, run (of animals)” under the early root ᴱ√LOPO, contrasted with ᴱQ. loqo- “run (of human beings)” (QL/56).

Neo-Sindarin: Derivatives of √LOP continued to appear in Tolkien’s later writings, such as N. lobor “horse” and lopoldë “rabbit”. I would therefore retain ᴺQ. lop- to describe the four-legged run of these and similar animals, meaning “gallop” or “*lope”.