INSUBSTANTIAL Synonyms: 70 Similar and Opposite Words

insubstantial

adjective

ˌin(t)-səb-ˈstan(t)-shəl

Definition of insubstantial

as in unsubstantial

being of a material lacking in sturdiness or substance an insubstantial carton that could not possibly stand up during long-distance shipping

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in spiritual

not composed of matter energy is insubstantial

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

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Recent Examples of insubstantial Scarlet’s good intentions to end wars by way of sheer determination to do what’s right might prove insubstantial in practice. — Carlos Aguilar, Los Angeles Times, 6 Feb. 2026 Oliver Rackham, the great historian of the British countryside, devoted a not insubstantial portion of his career to rebutting this claim, noting that there is no evidence whatsoever to suggest that these punishments were ever carried out. — Rosa Lyster, Harpers Magazine, 30 Dec. 2025 And since the lesser and insubstantial always has to give place to the greater and substantial, self-indulgent lust has no choice but to make way for our reflection of pure and perfect Love. — Tony Lobl, Christian Science Monitor, 28 Oct. 2025 These insubstantial claims did not improve much after the European powers departed. — Michael Barnes, Austin American Statesman, 2 July 2025 See All Example Sentences for insubstantial

Recent Examples of Synonyms for insubstantial

Adjective

Roadmaps are frequently high-level and unsubstantial.

— Peter Bendor-Samuel, Forbes.com, 19 June 2026
This can alter the amount and types of ACE-inhibiting peptides created during fermentation2—and possibly account for kombucha's unsubstantial effect on blood pressure.

— MD Published, Verywell Health, 27 Dec. 2025

Definition of unsubstantial

Adjective

In the years since grit’s heyday, much of American culture has succumbed to a state of emotional and spiritual defeat.

— Meghan O’Gieblyn, New Yorker, 14 Sep. 2026
Leadership continuously draws from a finite reserve of physical, mental, emotional and spiritual energy.

— Dennis Volpe, Forbes.com, 14 Sep. 2026

Definition of spiritual

Adjective

From flimsy designer knock-offs to trendy items that don’t fit your lifestyle, choosing the wrong furniture can lead to years of regret.

— Kristin Hohenadel, The Spruce, 17 Sep. 2026
There are tender moments between Loren Gray’s Cream Team leader Jess and her younger sister Bailey (Bailey Stender), part of Team Tassie, but mostly this additional crew just clutters up the flimsy scenario with too many characters.

— David Rooney, HollywoodReporter, 16 Sep. 2026

Definition of flimsy

Adjective

Followers of the Abrahamic religions are supposed to treat God as immaterial and incorporeal, yet these early Yahweh worshippers imagined him as fully embodied.

— Manvir Singh, New Yorker, 9 Mar. 2026
Positioned as a large-scale genre event, the series updates the legendary SFX property with a contemporary political and social edge, with Shun Oguri leading the cast as a detective hunting a seemingly incorporeal killer.

— Patrick Brzeski, HollywoodReporter, 27 Jan. 2026

Definition of incorporeal

Adjective

The gossamer thread holding the sacred feminine maelstrom together?

— Los Angeles Times, Los Angeles Times, 2 Sep. 2026
As with anything related to Meghan and Harry, even the most gossamer threads of gossip quickly ignited, and news of Meghan’s mysterious new role spread across multiple continents.

— K.J. Yossman, Variety, 25 Aug. 2026

Definition of gossamer

Adjective

The space will become an immaterial garden with intricate cutouts creating shadows, reflections and transparency for viewing the jewelry creations.

— Fairchild Studio, Footwear News, 3 Sep. 2026
But that doesn’t mean what happens along the way is immaterial.

— Kansas City Star, Kansas City Star, 25 Aug. 2026