Grassier is an adjective that is commonly used to describe something that is covered in or resembles grass. However, there are several synonyms that can be used in its place. Verdant is a very similar word that can be used to describe something lush and green. Similarly, sylvan refers to a wooded or forested area that is teeming with plant life. Another word that can be used as a synonym for grassier is pastural, which describes a setting that is typically found in the countryside and is filled with plants and animals. Finally, verdurous can be used to describe something that is covered in lush, green vegetation.