Land expanse is a term used to describe a large AREA of land, usually with no specific boundaries. ACRES, a unit of measurement for land AREA, is a 5 letter word commonly used to describe land expanse. TRACT, another 5 letter word, is also used to refer to a large AREA of land, often with a specific purpose or boundary. AREA, a 4 letter word, is a general term used to describe any portion of land, regardless of size or purpose.