imponderable Synonyms

less important supernatural subtle spiritual shadowy invisible intangible insubstantial insensible infinitesimal infinite inestimable unearthly unembodied unsubstantial unperceivable unobservable ultramicroscopic uncontemplatable unnoticeable nonphysical nonmaterial weightless volatile vague unworldly indistinguishable indiscernible ethereal erratic ephemeral elusive disembodied discarnate buoyant boundless bodiless asomatous airy evanescent ghostly imaginary incorporeal incorporate inconceivable incomprehensible incalculable inappreciable imperceptible impalpable