(n.) Unsubstantiality; unreality.

airiness airy nothing airy texture attenuation bodilessness danger delicacy desultoriness diaphanousness dilutedness dilution ethereality exiguity exility fineness flimsiness frailty gauziness gossameriness gracility hazard immateriality impalpability imponderability incorporeality infirmity insecurity insolidity instability intangibility laciness lightness mistiness paperiness peril perilousness precariousness rareness rarity risk riskiness shakiness shiftiness shiftingness slenderness slightness slimness slipperiness speculativeness subtility subtilty subtlety tenuity tenuousness thinness ticklishness treacherousness treachery unauthenticity unauthoritativeness unconcreteness undependability unfaithworthiness unreality unreliability unsolidity unsoundness unsteadfastness unsteadiness unsubstantiality unsubstantialness unsureness untrustworthiness vagueness wateriness weakness wispiness