The crossword solutions for the term MARE KNIGHT are STEED, which is a five-letter word. A STEED is a type of horse, usually referring to a strong and spirited horse that is used for riding or in battle. The term mare knight is a combination of two words, mare and knight. A mare is a female horse, while a knight is a mounted warrior in medieval times. Therefore, the term mare knight refers to a female horse that was used by a knight in medieval times.