Open English Wordnet
Adjectives
(s)eldritch, weird, uncanny, unearthlysuggesting the operation of supernatural influences“an eldritch screech”, “the three weird sisters”, “stumps...had uncanny shapes as of monstrous creatures” (John Galsworthy), “an unearthly light”, “he could hear the unearthly scream of some curlew piercing the din” (Henry Kingsley)