The term 'Rabbit Relative' can be summarized by three crossword solutions: Pika (4 letters), HARE (4 letters), and BEETLE (6 letters). Pika is a small mammal that is closely related to rabbits and hares, and is found in mountainous regions of Asia and North America. Hares are also closely related to rabbits and are found in Europe, Asia, and Africa. Beetles are not directly related to rabbits, but they are both members of the order Lagomorpha, which includes hares, rabbits, and pikas.