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Use "hornless" in a sentence
"Larger than an elk, the cabayo has rounded hooves, a hornless head, and a long-haired tail."
"Many cows (female) have horns (depending on the breed – some are bred to be hornless, called “polled”)."
"Ha, ha, ha … The reference, here, is to the Black or Aberdeen Angus breed of hornless cattle, which was developed through the first half of the nineteenth century from beasts native to the Scottish highland counties of Aberdeenshire and Angus, and successfuly transplanted thence to the New World."