Cross-bred is a term used to describe an animal or a plant that results from mating two different breeds or species. The antonyms for the word cross-bred are purebred, thoroughbred, and pedigree. Purebred refers to an animal that belongs to a recognized breed, and its ancestry can be traced back to its origins. Thoroughbred is a term used to describe a horse that is of a specific breed known for its agility, speed, and endurance. Pedigree means the animal has a recorded list of its ancestors, verifying its breeding and genetic makeup. These antonyms reflect the opposite of cross-breeding, which involves combining different breeds or species to produce offspring.