Difference between Insubstantial and Ethereal

INSUBSTANTIAL vs ETHEREAL: ADJECTIVE

Of heaven or the spirit
Of or containing or dissolved in ether
Characterized by unusual lightness and delicacy
Characterized by lightness and insubstantiality; as impalpable or intangible as air
Extremely light or delicate.
Of the celestial spheres; heavenly.
Spiritual or otherworldly.
Of or relating to ether.
Pertaining to the hypothetical upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere; celestial
Consisting of ether; hence, exceedingly light or airy; tenuous; spiritlike; characterized by extreme delicacy, as form, manner, thought, etc.
Pertaining to, derived from, or resembling, ether.
See Essential oil, under Essential.
A heavy, yellow, oily liquid consisting essentially of etherin, etherol, and ethyl sulphate. It is the oily residuum left after etherification. Called also heavy oil of wine (distinguished from oil of wine, or œnanthic ether).
A salt of some organic radical as a base; an ester.
Delicate, light and airy.

Formed of or containing or filled with ether (sense 1); hence, relating or belonging to the heavens or heaven; heavenly; celestial; spiritual: as, ethereal space; ethereal regions.
Figuratively, having the characteristics of ether or air; light, intangible, etc.
Existing in the air; resembling air; looking blue like the sky; aërial: as, “ethereal mountains,”
In physics, of, pertaining to, or having the constitution of ether (sense 2).
In chem., of or pertaining to an ether or to ether: as, “ethereal liquids,”
Same as volatile oil (which see, under volatile). Synonyms Airy, aerial, empyreal.
As impalpable or intangible as air

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

Dreamy, Intangible, Otherworldly, Aeriform, Aery, Aerial, Unsubstantial, Insubstantial, Unreal, Delicate, Celestial, Heavenly, Supernal, Airy, Gossamer

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

Dreamy, Intangible, Otherworldly, Aeriform, Aery, Aerial, Unsubstantial, Insubstantial, Unreal, Delicate, Celestial, Heavenly, Supernal, Airy, Gossamer

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.

Art thou wanting to steal mine Ethereal Ring?
Enjoy gorgeous, ethereal sunsets in the Man Islands.
This file is open with wireshark or ethereal.
ANT: Spiritual, ethereal, pure, selfcontrolled, temperate, exalted, refined.
It is ethereal, flooded with light and powerful.
This ethereal charm boost your passion for combat!
Ethereal Shadows: Communications and Power in Contemporary Italy.
You can go ethereal in Barovia, but once you leave the ethereal, you appear back in Barovia no matter where you went.
However, unless she or he has had extensive experience with, the ethereal victim will be completely helpless and disoriented on the Ethereal Plane.
Indeed, a rather ethereal tweed as befitted a vivacious though equally ethereal redhead.