SUBSTANTIALLY Synonyms: 57 Similar and Opposite Words

substantially

adverb

Definition of substantially

as in mostly

for the most part the Little House books are substantially based on the memories of Laura Ingalls Wilder

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Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of substantially Research from Ahrefs found that Google’s AI Overviews substantially reduce the click-through rates for the top organic search result. — Jay Sen, Forbes.com, 14 Sep. 2026 Yet the likelihood of that eventuality coming to pass has receded substantially now the England international has signed a new five-year contract. — Chris Waugh, New York Times, 11 Sep. 2026 The suits say continuous noise from data centers’ cooling systems and power generators is substantially interfering with local neighbors’ use and enjoyment of their property — a legal standard for proving a private nuisance. — Nathaniel Meyersohn, CNN Money, 11 Sep. 2026 Melatonin remained substantially lower during the blue-light condition, whereas participants exposed to red light experienced a stronger increase in melatonin as the evening progressed. — Ascend Agency, New York Daily News, 11 Sep. 2026 At the same time, annual increases in Medicare premiums and deductibles can substantially reduce the relief from inflation that COLA is supposed to provide. — Sarah Moreno, Miami Herald, 11 Sep. 2026 Together, these changes position the Series 12 as a substantially more powerful fitness tracker. — Andrew Gebhart, PC Magazine, 10 Sep. 2026 Pilots warn of public harms from sale If Spirit is forced to segregate a large chunk of data, the value of the dataset may substantially depreciate for Google. — Ashley Belanger, ArsTechnica, 10 Sep. 2026 The timing has raised questions since Katie’s online activity changed substantially around the same period. — Paloma Chavez, PEOPLE, 10 Sep. 2026

Recent Examples of Synonyms for substantially

Adverb

For motorists with electric vehicles, the average kilowatt hour cost at charging stations in Florida on Sunday rounded up to 41 cents, a rate mostly unchanged since early March.

— News Service Of Florida, Sun Sentinel, 8 Sep. 2026
Sweaters, which are mostly made in Turkey, retail for $295 to $395 for the core line and $395 to $900 for the Italian collection.

— Jean E. Palmieri, Footwear News, 8 Sep. 2026

Definition of mostly

Adverb

In the last decade Germany has sheltered millions of refugees, mainly from Syria and other troubled countries in the Middle East.

— Erik Kirschbaum, Los Angeles Times, 5 Sep. 2026
There are only a handful of performances currently scheduled at the Kennedy Center, mainly at the adjacent facility known as the REACH.

— ABC News, ABC News, 5 Sep. 2026

Definition of mainly

Adverb

Rea has largely been in mop-up duty since moving out of the rotation.

— Sahadev Sharma, New York Times, 11 Sep. 2026
That’s a big deal for folks that aren’t necessarily experts on government ethics rules — the president, not just this president, but all presidents have been largely exempt from any conflicts of interest rules.

— Eleanor Mueller, semafor.com, 10 Sep. 2026

Definition of largely

Adverb

That would mean that repetition, rather than representation, is chiefly at stake—a hypnotic ritual.

— Jeffrey Weiss, Artforum, 1 Sep. 2026
Many of the dozens missing in its environs were foreign nationals, chiefly Indian or Indian-origin pilgrims who were returning from, or preparing to make, the journey further into Tibet to Mount Kailash, a holy site for Hindus and Buddhists.

— Ishaan Tharoor, New Yorker, 29 Aug. 2026

Definition of chiefly

Adverb

Williams has the versatility to play inside and out, despite playing primarily in the slot in college.

— Matt Schneidman, New York Times, 7 Sep. 2026
Larson notes that whole-wheat or whole-grain crust generally provides more fiber and micronutrients such as magnesium than crust made primarily from refined white flour.

— Daryl Austin, USA Today, 6 Sep. 2026

Definition of primarily

Adverb

Many tech leaders generally say their goal is to develop the technology in ways that promote safety, address legal liability, feed economic growth, advance science and preserve national security.

— Arkansas Online, Arkansas Online, 15 Sep. 2026
Potential Risks of Drinking Green Tea Green tea is generally considered safe and healthy when consumed in normal amounts, such as a few cups a day.

— Jillian Kubala, HEALTH, 15 Sep. 2026

Definition of generally

Adverb

Their focus is principally Travis Kelce, who is reclined on an outdoor sofa, posing for a Tommy Hilfiger campaign.

— Nick Remsen, Vogue, 1 Sep. 2026
This rising use of AI has principally been spurred by the evolving advances and widespread adoption of generative AI and LLMs such as ChatGPT, GPT-5, Claude, Gemini, Copilot, and others.

— Lance Eliot, Forbes.com, 30 Aug. 2026