Adverbs for Cavernous

astonishingly; marvellously; frighteningly; indistinctly; strangely; terribly; hideously; formidably; darkly; dimly; vastly; mysteriously; allur; deeply; dangerously; alarmingly; irresistibly; fantastically; gloomily; obscurely; duskily; murkily; sombrely; awfully.