Persian and Siamese cats are two of the most popular breeds of cats. Both breeds have long, luxurious coats and are known for their intelligence and affectionate personalities. Persian cats are known for their round faces and short noses, while Siamese cats are known for their slender bodies and pointed features. Both breeds are highly sought after by CAT lovers around the world. The answer to the crossword puzzle is CAT, a three letter word that accurately describes both breeds.