Cougar is a slang term that refers to a woman who seeks sexual relations with considerably younger men.
zona - (anatomy) any encircling or beltlike structure zone anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; he has good bone structure
Zircon is a type of gemstone. It's desirable because of the range of colors that it comes in and because it's less expensive than other gemstones, especially diamonds. Although it sometimes gets confused with cubic zirconia, the two are only similar in name.