Reindeer kin are members of the deer family, which includes ELK and moose. The two crossword solutions for reindeer kin are ELKS and ELK. ELKS is a four-letter word that refers to a large species of deer native to North America and Europe, while ELK is a three-letter word that refers to a large species of deer native to Eurasia and North America. Both ELKS and ELK are members of the same family as reindeer, making them reindeer kin.