Synonyms for Miraculous (same or very similar meaning)
WordNet sense 1 (being or having the character of a miracle):
marvelous, marvellousWordNet sense 2 (not existing in nature or subject to explanation according to natural laws; not physical or material):
supernaturalWordNet sense 3 (peculiarly fortunate or appropriate; as if by divine intervention):
heaven-sent, providentialWordNet sense 4 (having unexpected good fortune):
fortunateFrom the ODE community, based on WordNetadd/edit