The term PET STORE LIZARD can be solved by the five-letter word GECKO. Geckos are small lizards that are popular as pets due to their unique appearance and behavior. They are found in warm climates around the world, and are known for their ability to climb walls and ceilings. They come in a variety of colors and sizes, and can live up to 10 years in captivity. Pet store lizards are typically geckos, and they make great companions for those looking for an exotic pet.