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

Synonyms & Similar Words

Relevance

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 The strongest applicants may qualify for rates in the low single digits, while borrowers with weaker credit may receive substantially higher offers. — Deane Biermeier, USA Today, 26 Aug. 2026 In practical terms, someone deliberately trying to conceal Claude's involvement could simply rewrite the output substantially. — New Atlas, 25 Aug. 2026 That mechanism has weakened substantially since the global financial crisis, and particularly since 2020. — Nick Lichtenberg, Fortune, 25 Aug. 2026 Nirat/Getty Images Paying for college has changed substantially for borrowers over the last few years — and some big changes went into effect recently. — Angelica Leicht, CBS News, 25 Aug. 2026 Investors worldwide fret that tech firms’ revenues are struggling to keep up with the AI spending spree, which has added substantially to their debt piles, part of the reason some have pivoted to selling equity as Google also did in June. — Jeronimo Gonzalez, semafor.com, 24 Aug. 2026 Ukrainian President Volodymyr Zelensky said on Sunday that his country is receiving substantially fewer Patriot defense systems, even as Russian ballistic attacks are increasing. — Sylvia Hui, Los Angeles Times, 24 Aug. 2026 According to Rockford Map, a company that publishes plat maps and plat books, counties began developing plat books in the 1850s, and their use grew substantially in the last quarter of the 19th century. — Susan Sarkauskas, Chicago Tribune, 24 Aug. 2026 Ukrainian President Volodymyr Zelenskyy said on Sunday that his country is receiving substantially fewer Patriot defense systems, even as Russian ballistic attacks are increasing. — ABC News, 24 Aug. 2026

Recent Examples of Synonyms for substantially

Adverb

The National Weather Service has issued an extreme heat warning that applies to more than 1 million people in San Diego County, mostly across inland valleys, foothills and mountains where high temperatures will approach or exceed 95 to 114 degrees.

— Gary Robbins, San Diego Union-Tribune, 26 Aug. 2026
After all, horror isn’t exactly a Broadway staple and producers have mostly given up that particular ghost.

— Frank Rizzo, Variety, 26 Aug. 2026

Definition of mostly

Adverb

Done with a cheek swab, blood draw or saliva sample, this testing mainly looks at liver enzymes that affect how the body metabolizes medicines.

— Jen Christensen, CNN Money, 29 Aug. 2026
It’s mainly centered on Billie, who is worried about an old Facebook post standing in the way of finding a job.

— Ben Rosenstock, Vulture, 28 Aug. 2026

Definition of mainly

Adverb

While High-Flyer’s pre-IPO picks have largely aligned with China’s national priorities, its own priority is still potential investment upside, industry experts say.

— Anniek Bao,Elaine Yu, CNBC, 28 Aug. 2026
This is an episode built largely on a series of escalating miscommunications.

— Ben Rosenstock, Vulture, 28 Aug. 2026

Definition of largely

Adverb

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
Today, other drugs are more often deployed, chiefly benzodiazepines or the benzodiazepine Clonazepam, which also render a person zombie-like and more reliably submissive.

— Mattha Busby, Rolling Stone, 19 Aug. 2026

Definition of chiefly

Adverb

Summary The Toronto Blue Jays are struggling to meet high expectations this season, primarily due to the unexpected offensive slump of star Vladimir Guerrero Jr.

— Peter Chawaga, Forbes.com, 30 Aug. 2026
Diamondback Energy Mehta is also bullish on Diamondback Energy, an independent oil and natural gas company focused on energy reserves that are primarily in the Permian Basin in West Texas.

— TipRanks.com Staff, CNBC, 30 Aug. 2026

Definition of primarily

Adverb

In the aftermath of World War II, looking Asian was considered a liability in their predominantly white town.

— Tommy Orange, Vulture, 26 Aug. 2026
Monochromatic features carry through with lighter gray eyestay clips and netting, as well as a predominantly black midsole, TPU wings and lining.

— Ian Servantes, Footwear News, 26 Aug. 2026

Definition of predominantly

Adverb

Asians generally have longer life expectancies than those outside the region—but longer lives aren’t the same as healthier ones.

— Angelica Ang, Fortune, 26 Aug. 2026
Deployed as a No 10 and later as a striker, Wissa epitomised all that was good about Newcastle with his energy and drive, leaving a trail of Liverpool players in his wake in the lead-up to the second goal and generally inspiring those around him.

— Stuart James, New York Times, 25 Aug. 2026

Definition of generally

Adverb

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
Massachusetts should examine whether programs operating under the banner of victim services remain principally accountable to victims.

— Laurie Myers, Boston Herald, 26 Aug. 2026