Ferned is an adjective used to describe something that is covered or surrounded by ferns. Synonyms for ferned include verdant, leafy, lush, overgrown, and green. "Verdant" describes something that is fresh and vibrant, as well as well-watered and fertile. "Leafy" emphasizes the presence of large and broad leaves, as well as luxuriant growth. "Lush" paints a picture of something that is rich, luxuriant, and soft. "Overgrown" suggests that something has grown excessively large and is now out of control. "Green" is a classic synonym for ferned and refers to the vibrant color of the fern's leaves.