The term 'Bull or Cow' refers to two large species of ungulates, which are hoofed mammals. The bull is a male bovine, while the cow is a female bovine. The crossword solutions for this term are MOOSE (5 letters) and ELK (3 letters). MOOSE and ELK are both members of the deer family, and are the largest species of deer in North America. They are both found in northern regions of the continent, and have similar physical characteristics, such as long legs, antlers, and thick fur coats.