Search Result for "grotto": 
Wordnet 3.0

NOUN (1)

1. a small cave (usually with attractive features);
[syn: grotto, grot]

The Collaborative International Dictionary of English v.0.48:

grotto \grot"to\ (gr[o^]t"t[-o]), n.; pl. Grottoes (gr[o^]t"t[=o]z). [Formerly grotta, fr. It. grotta, LL. grupta, fr. L. crypta a concealed subterranean passage, vault, cavern, Gr. kry`pth, fr. krypto`s concealed, fr. kry`ptein to conceal. Cf. Grot, Crypt.] A natural covered opening in the earth; a cave; also, an artificial recess, cave, or cavernlike apartment. [1913 Webster]
WordNet (r) 3.0 (2006):

grotto n 1: a small cave (usually with attractive features) [syn: grotto, grot]
Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "grotto": abri, antre, bunker, burrow, cave, cavern, cove, dugout, foxhole, grot, hole, lair, sewer, subterrane, subterranean, subway, tunnel, warren