Difference between Insubstantial and Aeriform

INSUBSTANTIAL vs AERIFORM: ADJECTIVE

Characterized by lightness and insubstantiality; as impalpable or intangible as air
Resembling air or having the form of air
Pertaining to air, or having a form similar to that of air.
Light, unsubstantial, or unstable.

Having the form or nature of air, or of an elastic invisible fluid; gaseous. The gases are aëriform fluids.
Figuratively, unsubstantial; unreal.
As impalpable or intangible as air

Trifling, Vacuous, Flimsy, Insignificant, Aery, Aeriform, Aerial, Unwholesome, Shadowy, Wraithlike, Airy, Unreal, Ethereal, Jejune, Unsubstantial

Incombustibility, State of matter, Fluid, Airiness, Gaseousness, Fluxure, Unreal, Insubstantial, Gaseous, Aery, Unsubstantial, Airy, Aerial, Ethereal, Airlike

Trifling, Vacuous, Flimsy, Insignificant, Aery, Aeriform, Aerial, Unwholesome, Shadowy, Wraithlike, Airy, Unreal, Ethereal, Jejune, Unsubstantial

Immaterialize, Incombustibility, State of matter, Fluid, Airiness, Gaseousness, Unsubstantial, Unreal, Insubstantial, Gaseous, Ethereal, Airy, Airlike, Aery, Aerial

Nothing insubstantial stays put, neither people nor physical objects.
IRS burden associated with redacting such information are insubstantial.
The characters from Hell are also airy and insubstantial.
The claims in this case are clearly not insubstantial.
See that this workaround has a not insubstantial price.
Not insubstantial for your average health care seeker.
Uses insubstantial information that is primarily common knowledge.
The absence of a writing is not insubstantial.
Too narrow and the porch will look insubstantial.
Weapons made from astral driftmetal can harm insubstantial beings as if they had the Affects Insubstantial modifier.

To convert into gas, or an aeriform fluid, as by the application of heat, or by chemical processes.
Any elastic aeriform fluid in which the molecules are separated from one another and have free pa__s.