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

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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 The boxes allegedly cost substantially less to produce, allowing the conspirators to use the inflated prices to finance bribes and divert government funds. — Antonio María Delgado, Miami Herald, 12 Oct. 2026 Proposition 45 would substantially alter the landmark California Environmental Quality Act. — Los Angeles Times, 12 Oct. 2026 Customers, especially younger generations who on average drink substantially less, are driving the demand. — Gary Baum, HollywoodReporter, 11 Oct. 2026 Duration varies substantially across the area because Ta’if lies toward the edge of the eclipse path, so eclipse chasers will need to choose their precise observing location carefully. — Jamie Carter, Space.com, 10 Oct. 2026 Debra Schade, president of the California School Boards Association, said there is no guarantee public schools will substantially benefit from the tax. — ABC News, 9 Oct. 2026 The ending, which substantially departs from Malerman’s novel, offers a richer choice than the source material. — Alison Foreman, IndieWire, 9 Oct. 2026 Slower charging modes substantially reduce noise, while solar charging can be virtually silent. — Michael Lydick, PC Magazine, 9 Oct. 2026 However, researchers at the University of California, Riverside, who studied GPT-3 offered an estimate that is substantially higher than Altman’s claim. — Encyclopedia Britannica, 9 Oct. 2026

Recent Examples of Synonyms for substantially

Adverb

People went through the admission and security checkpoints without issues, and the event’s early evening acts enjoyed mostly dry stages with light, intermittent rain.

— Isabel Rivera, Miami Herald, 18 Oct. 2026
Though their loss to the Vikings was mostly to a backup quarterback there as well.

— OutKick, FOXNews.com, 18 Oct. 2026

Definition of mostly

Adverb

What to do nearby The Algarve is mainly populated with beach resorts—and most are much larger than this one.

— Condé Nast, Condé Nast Traveler, 17 Oct. 2026
Reps for Busfield, who has been out on bond and mainly on the East Coast since the beginning of the year, and his main lawyer Larry Stein did not respond to Deadline’s request for comment on the news.

— Dominic Patten, Deadline, 16 Oct. 2026

Definition of mainly

Adverb

Advertisement France has never seen so many violent incidents in a movement made up largely of high school students.

— Nicholas Bequelin, Time, 16 Oct. 2026
Violent crime concentrates in poor neighborhoods, and largely because of our history, Black Americans are far more likely than white Americans to live in them.

— Arkansas Online, Arkansas Online, 16 Oct. 2026

Definition of largely

Adverb

Although the strategic consequences of their actions may ultimately benefit Iran in its own regional and international conflicts, the Houthis see their military campaign against Saudi Arabia chiefly as an act of national defense.

— Laurent Bonnefoy, The Conversation, 14 Oct. 2026
The animation of the original series was overseen by three South Korean studios, chiefly JM Animation in the early seasons and MOI Animation in the latter ones.

— Sarah Shachat, IndieWire, 13 Oct. 2026

Definition of chiefly

Adverb

The system is primarily intended to counter small unmanned aircraft.

— Prabhat Ranjan Mishra, Interesting Engineering, 16 Oct. 2026
Their list consists primarily of interventions such as more per-pupil funding, banning cellphones and restricting artificial intelligence in the classroom.

— Gustavo E. Fischman, Fortune, 16 Oct. 2026

Definition of primarily

Adverb

Some predominantly Muslim neighborhoods on the city's peripheries, with narrow and steep mazelike streets, have high crime rates.

— ABC News, ABC News, 12 Oct. 2026
After seven years of promoting local businesses in San Francisco’s predominantly Latino Mission District, the nonprofit has a brick-and-mortar space that reflects its passion for the neighborhood.

— Terry Tang, Los Angeles Times, 12 Oct. 2026

Definition of predominantly

Adverb

The source was generally in good condition, but mold spots and dense clusters of small white specks required careful treatment.

— Lin Ying-Hsuan, Variety, 13 Oct. 2026
Photos were generally limited to 2,048 pixels on the long edge, while videos could be delivered at resolutions up to 720p.

— Kurt Knutsson, FOXNews.com, 13 Oct. 2026

Definition of generally

Adverb

That shift carries potential implications for concussion and traumatic brain injury (TBI) research, which has relied principally on federal support, particularly from the Department of Defense and the National Institutes of Health.

— Daniel Libit, Sportico.com, 12 Oct. 2026
The whole city ends up bearing the brunt of astronomical housing prices that, whatever their other causes, are principally downstream from a housing market that quite simply cannot keep up with demand.

— New York Daily News Editorial Board, New York Daily News, 4 Oct. 2026