Synonyms for Unearthly (same or very similar meaning)
WordNet sense 1 (concerned with or affecting the spirit or soul):
spiritualWordNet sense 2 (suggesting the operation of supernatural influences):
uncanny, weird, eldritchWordNet sense 3 (not existing in nature or subject to explanation according to natural laws; not physical or material):
supernaturalFrom the ODE community, based on WordNetadd/edit