Grassy expanses are large areas of land covered in grass. LAWNS, which are five letter words, are a type of grassy expanse that is often found in residential areas and parks. Llanos, which are six letter words, are another type of grassy expanse that are found in the tropical grasslands of South America. Leas, which are four letter words, are grassy expanses that are typically found in the British Isles and are used for grazing livestock.