The term 'Moose Cousin' refers to three different species of animals that are related to the moose. The first is the DEER, which is a four-letter word and is a hoofed mammal that is found in many parts of the world. The second is the ELK, which is a three-letter word and is a large species of DEER native to North America and eastern Asia. The third is the WAPITI, which is a six-letter word and is a species of DEER native to North America and eastern Asia that is larger than the ELK. All three of these animals are closely related to the moose and are considered its cousins.