Lying fallow refers to a piece of land that is left uncultivated for a period of time to naturally restore its fertility. There are several synonyms for this word, including idle, dormant, unproductive, inactive, barren, unused, untouched, and resting. These words all suggest a state of dormancy or inactivity, and are commonly used to describe a situation where something is temporarily out of use and waiting to be utilized. By utilizing these synonyms, individuals can add more depth and nuance to their writing, and can convey a variety of different ideas related to land, agriculture, and sustainability.