unsubstantial Synonyms

unreal insubstantial papery spiritual subtile superficial superstitious tenuous thin trifling trivial unconceivable spectral slight phantasmagoric phantasmal purportless rarefiable rickety shadowy shaky shattery short-lived skeletal unconsequential undistinctive unembodied nonphysical nonsubmersible unbelievable dreamlike phantasmagorical wimpy surreal trancelike unconvincing wafer-thin nonmaterial footling unfleshly unsound vaporous visionary weak weakly weightless unimportant unbodied lightweight wraithlike