1
as in speed
a high rate of movement or performance
the amazing fastness with which the boy took his shower had us wondering if he'd used any water
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in stronghold
a structure or place from which one can resist attack
the guerillas retreated to their network of hidden fastnesses deep within the mountains
Synonyms & Similar Words
3
as in loyalty
adherence to something to which one is bound by a pledge or duty
his uncompromising fastness to the cause of freedom was beyond question
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of fastness
Like the pressing, the hard work mentality and fastness of transition for example.
—
Andy Jones, New York Times, 29 May 2025
Editors and contributors compare dozens of sets and look for qualities such as softness, durability, breathability, color fastness, and how well the linens launder and withstand wear.
—Yelena Moroz Alpert, Architectural Digest, 16 May 2025
The system ensures good wet-rubbing and dry-rubbing fastness and softness on all kinds of fabrics.
—Angela Velasquez, Sourcing Journal, 30 Dec. 2024
The system ensures good wet-rubbing and dry-rubbing fastness and softness on all kinds of fabrics.
—Angela Velasquez, Sourcing Journal, 30 Dec. 2024
Tat-Fung’s Downtown collection of blue, black and gray fabrics outperform conventional denim in color fastness, according to Tim Huesemann, the mill’s sales director.
—Angela Velasquez, Sourcing Journal, 22 Oct. 2024
This advancement enables dyeing with Basic dyes, promising enhanced dye uptake and superior wash fastness compared to traditional Reactive dyes.
—Sj Studio, Sourcing Journal, 13 Sep. 2024
The Neutral Ground had cowboys (or Cow Boys), Indians, cavalry attacks and rescues, and secret woodland fastnesses known only to the canniest frontiersman.
—Ian Frazier, The New Yorker, 15 July 2024
The technology uses specific formaldehyde-free agents to enhance the dyeing process of raw garments, resulting in a bright and deep indigo color, improving wash and rubbing fastness, and increasing lightfastness and levelness.
—Andrea Onate, WWD, 12 June 2024
Andy Jones, New York Times, 29 May 2025
Editors and contributors compare dozens of sets and look for qualities such as softness, durability, breathability, color fastness, and how well the linens launder and withstand wear.
—Yelena Moroz Alpert, Architectural Digest, 16 May 2025
The system ensures good wet-rubbing and dry-rubbing fastness and softness on all kinds of fabrics.
—Angela Velasquez, Sourcing Journal, 30 Dec. 2024
The system ensures good wet-rubbing and dry-rubbing fastness and softness on all kinds of fabrics.
—Angela Velasquez, Sourcing Journal, 30 Dec. 2024
Tat-Fung’s Downtown collection of blue, black and gray fabrics outperform conventional denim in color fastness, according to Tim Huesemann, the mill’s sales director.
—Angela Velasquez, Sourcing Journal, 22 Oct. 2024
This advancement enables dyeing with Basic dyes, promising enhanced dye uptake and superior wash fastness compared to traditional Reactive dyes.
—Sj Studio, Sourcing Journal, 13 Sep. 2024
The Neutral Ground had cowboys (or Cow Boys), Indians, cavalry attacks and rescues, and secret woodland fastnesses known only to the canniest frontiersman.
—Ian Frazier, The New Yorker, 15 July 2024
The technology uses specific formaldehyde-free agents to enhance the dyeing process of raw garments, resulting in a bright and deep indigo color, improving wash and rubbing fastness, and increasing lightfastness and levelness.
—Andrea Onate, WWD, 12 June 2024
Recent Examples of Synonyms for fastness
Noun
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Those who master it can gain a significant competitive advantage in both speed and accuracy of their research and analysis. 4.—
Daniel Hu,
Forbes.com,
15 July 2025
-
The city of Chicago is home to the nation’s highest count of red-light cameras, along with speed cameras.—
Charles Selle,
Chicago Tribune,
14 July 2025
Noun
-
Once a royal residence turned military stronghold, its subterranean spaces include powder magazines and storerooms that played a vital role in its defense, illustrating medieval fortification architecture.—
Joseph V Micallef,
Forbes.com,
8 July 2025
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The company has also been a Tennessee stronghold on the Fortune 500 for over a decade.—
Hadley Hitson,
The Tennessean,
2 July 2025
Noun
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Your ability to fully engage with your team, even for a few minutes, can build trust and loyalty far faster than long meetings filled with distractions.—
Dr. Eric George,
Forbes.com,
8 July 2025
-
The luxury hotel titans appearing on this year’s list of readers’ favorite hotel brands have earned the admiration and loyalty of T+L readers by surpassing expectations at every turn, from top-tier accommodations to personalized service that makes every guest feel at home.—
Sarah Bruning,
Travel + Leisure,
8 July 2025
Noun
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The case for Wood starts with his impressive average exit velocity (EV) of 93.6, the eighth-best number in MLB -- and the third-highest of anyone participating in the Derby, behind Cruz's league-leading 96.3 EV and Olson's 93.8 EV.—
Tyler Everett,
MSNBC Newsweek,
14 July 2025
-
Second, redefine success metrics to go beyond feature velocity.—
Sandeep Jha,
Forbes.com,
14 July 2025
Noun
-
Since its launch, the CUDA ecosystem has created an impenetrable fortress of developer lock-in that competitors have failed to breach despite years of effort.—
Steven Wolfe Pereira,
Forbes.com,
9 July 2025
-
City Hall, Albany—these have been fortresses of political entrenchment for a century.—
Benjamin Wallace-Wells,
New Yorker,
25 June 2025
Noun
-
If anything, the blue-and-red Cubs hat made his allegiance clear.—
Virginia Chamlee,
People.com,
9 July 2025
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Patriotic education does not mean propaganda to produce blind allegiance to the government.—
Linda McMahon,
The Orlando Sentinel,
6 July 2025
Noun
-
Consider San Francisco, a former bastion of the state’s far-left.—
Douglas Schoen,
Oc Register,
13 July 2025
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In June, the U.N. said, more than 147,000 people fled their homes in the central region, once a bastion of safety for those trying to escape the horrors of the capital.—
Jacqueline Charles
July 11,
Miami Herald,
11 July 2025
Noun
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Duckworth encourages readers to cultivate long-term dedication to their goals, overcome setbacks, and maintain a growth mindset to achieve excellence.—
Jann E. Freed,
Forbes.com,
14 July 2025
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Soliman's case has attracted wide attention since about 75 supporters held a press conference about his case just after his arrest: Local parents and medical professionals have been writing the immigration court, extolling his dedication to sick children.—
Patricia Gallagher Newberry,
The Enquirer,
14 July 2025
Cite this Entry
“Fastness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fastness. Accessed 20 Jul. 2025.
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