Synonyms for Ethereal:

adj.

aerial (adjective)
aeriform.
beautiful (adjective)
breathtaking, angelic, stunning, splendid, glorious, ravishing, exquisite, beautiful, gorgeous, elegant.
delicate, heavenly (adjective)
divine, supernal, airy, aerial, gossamer, celestial, spiritual, intangible, unworldly, exquisite, impalpable, empyreal, insubstantial, Vapory, tenuous, unearthly, fine, subtle, unsubstantial.
heavenly (adjective)
celestial.
immaterial (adjective)
eerie, bodiless, abstract, incorporeal, supernatural, unearthly, impalpable, imponderable, intangible, immaterial, spiritual, unsubstantial, imaginary, theoretical, apparitional, unworldly, conceptual.
insubstantial (adjective)
incorporeal.
light (adjective)
weightless.
unsubstantial (adjective)
illusory, nonexistence, tenuous, unsubstantial, null, impalpable, empty, intangible, vacant, vacuous, unreal, weightless, spectral, chimerical, unconcrete, immaterial, insignificance, apparitional, phantasmal, inessential.
wispy (adjective)
gossamer, rare, wispy, fine, tenuous, subtle.

n.

thick, Gossamery, Vapory. celestial (noun)
astronomical, divine, empyreal.
delicate (noun)
fragile.
ethereal (noun)
aery, insubstantial, airy, gossamer, supernal, delicate, heavenly, unsubstantial, aerial, unreal, celestial, aeriform.

Other synonyms:

Vapory, Gossamery. saintly
angelic.
Other relevant words:
fragile, angelic, heavenly, aerial, delicate, aeriform, supernal, aery, insubstantial, empyreal, Vapory, divine, exquisite, celestial, Gossamery, airy.

Usage examples for ethereal

  1. The moon shone on her face, which, as I had dreamed of it, looked at once ethereal and very human under the silvery light. – The Mistress of Bonaventure by Harold Bindloss
  2. How great is the joy and how fascinating the pursuit of such an ethereal affection! – Little Rivers A Book Of Essays In Profitable Idleness by Henry van Dyke
  3. But such ethereal slumber may not bide The ascending sun's bright scorn- not long, I fear; And all its visions on the golden tide Of mid- noon gliding off, must disappear. – Rose and Roof-Tree Poems by George Parsons Lathrop