Synonyms of cavern
Copyright © 2016 by HarperCollins Publishers. All rights reserved.
caveA cave is a large hole in the side of a cliff or hill, or one that is under the ground.
• creatures such as bats and moths which shelter in caves
grottoA grotto is a small cave with interesting or attractively shaped rocks.
• Water trickles through an underground grotto.
hollowA hollow is an area that is lower than the surrounding surface.
• where water gathers in a hollow and forms a pond
Thesaurus for cavern from the Collins English Thesaurus
a cave, esp when large and formed by underground water, or a large chamber in a cave