The term 'kind of monster' can be summarized by two crossword solutions: GILA (4 letters) and GREENEYED (9 letters). GILA is a type of giant lizard found in the southwestern United States and northern Mexico. It is the largest species of lizard in North America and can grow up to two meters in length. GREENEYED is a type of mythical creature, often described as having a human body with green eyes and a lion's head. It is believed to have originated in ancient Egypt and is associated with protection and guardianship.