There are several synonyms for the term "lawn seat," which refers to an open-air seating arrangement on a grassy area. One synonym is "picnic blanket," which typically refers to a large, flat cloth spread out on the ground for relaxing or dining. Another synonym is "outdoor seating," which can encompass a wide range of seating arrangements in an outdoor area, including lawn seats. Additionally, "camp chair" or "folding chair" may be used to describe a portable chair that can be taken outdoors and used on a lawn. Finally, "garden bench" refers to a more permanent seating option that is often found in a garden or park setting.