1
as in abnormal
departing from some accepted standard of what is normal
it was a bank customer's slightly irregular behavior that made people suspicious
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in sporadic
lacking in steadiness or regularity of occurrence
irregular mail delivery to the island
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in uneven
not having a level or smooth surface
although the moon looks smooth from here, it actually has a very bumpy and irregular surface
Synonyms & Similar Words
Antonyms & Near Antonyms
4
as in informal
not rigidly following established form, custom, or rules
the request is irregular, but I'll allow it
Synonyms & Similar Words
Antonyms & Near Antonyms
5
as in changing
not staying constant
irregular gusts of wind
Synonyms & Similar Words
Antonyms & Near Antonyms
as in guerrilla
Related Words
Dissimilar Words
Example Sentences
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Recent Examples of irregular
New Atlas, 2 Jan. 2026
By dramatizing and diversifying its many acts of formation, Your Name Here provides its few but devoted admirers with a surprisingly moving argument for spiky, irregular, even incomplete literature.
—Robert Rubsam, The Atlantic, 1 Jan. 2026
Paula Allen, ExpressNews.com, 15 Feb. 2020
Turkish troops then began shelling Kurdish towns in Syria, and Turkish forces pushed forward, irregulars executing people in ditches along the road.
—Time, 14 Nov. 2019
See All Example Sentences for irregular
Adjective
World-first findings on coffee and irregular heartbeat University of Adelaide and University of California, San Francisco (UCSF) researchers led a randomized clinical trial of 200 adults from Australia, the US and Canada with atrial fibrillation (AF) to test coffee's impact on irregular heartbeats.
—New Atlas, 2 Jan. 2026
By dramatizing and diversifying its many acts of formation, Your Name Here provides its few but devoted admirers with a surprisingly moving argument for spiky, irregular, even incomplete literature.
—Robert Rubsam, The Atlantic, 1 Jan. 2026
Noun
As volunteer companies were raised to drive out the Mexican forces — who were occupying their own country — some of the irregulars were joined by free black men.
—Paula Allen, ExpressNews.com, 15 Feb. 2020
Turkish troops then began shelling Kurdish towns in Syria, and Turkish forces pushed forward, irregulars executing people in ditches along the road.
—Time, 14 Nov. 2019
See All Example Sentences for irregular
Recent Examples of Synonyms for irregular
Adjective
-
The new guidance reflects the latest research showing that HPV tests, compared to Pap smears, can increase the detection of abnormal cells in the cervix that may lead to cancer.—
Aria Bendix,
NBC news,
5 Jan. 2026
-
Kickers often have an abnormal route to high-level football.—
Ren Clayton,
CBS News,
5 Jan. 2026
Adjective
-
Because, well, our relationship was always so sporadic.—
Eric Andersson,
PEOPLE,
4 Nov. 2025
-
Despite sporadic staff shortages at air traffic control facilities across the country since the shutdown began, flight operations have been largely normal.—
Nicole Fallert,
USA Today,
3 Nov. 2025
Adjective
-
Future work will focus on integrating snow-deposition modeling with PV yield simulations to more accurately predict energy losses and on expanding analyses to more complex, uneven alpine terrain.—
Jijo Malayil,
Interesting Engineering,
8 Nov. 2025
-
The Trojans' uneven season hasn't exactly helped slow rumors either.—
Rowan Fisher-Shotton,
MSNBC Newsweek,
8 Nov. 2025
Adjective
-
During the 2020 cycle, disinformation targeting Black voters has been spreading through informal channels on social media, according to a report by NBC News.—
David Smiley,
Miami Herald,
7 Nov. 2025
-
The informal meeting represents the first layer in the appeals process the district is entitled to avail itself of, Lecholop said.—
Silas Allen,
Fort Worth Star-Telegram,
7 Nov. 2025
Noun
-
Born in Caracas, Rodríguez is the daughter of Marxist guerrilla leader Jorge Antonio Rodríguez, a co-founder of the Socialist League.—
Emma Bussey,
FOXNews.com,
6 Jan. 2026
-
The daughter of a Marxist guerilla who rose to notoriety in the 1970s for capturing an American businessman, Rodríguez is adept at embracing contradiction in the name of political expediency.—
Ellie Austin,
Fortune,
6 Jan. 2026
Adjective
-
For thousands of years, men in power have been responsible for catastrophe after genocide after unnatural disaster.—
Sophie Gilbert,
The Atlantic,
5 Nov. 2025
-
Scrutinize fine details like hair, fur, or repetitive patterns that may appear unnatural, and inspect for illogical lighting, shadows, or odd background elements.—
Matt Emma,
USA Today,
3 Nov. 2025
Adjective
-
So Fernandez ended up scoring two goals and incessantly bothering the Charlotte FC players with his ball skills and occasional extracurricular activity.—
Scott Fowler,
Charlotte Observer,
8 Nov. 2025
-
As a durable and washable rug brand, Ruggable is one of our favorite destinations for outdoor rugs, kids rugs, and even the occasional doormat or entryway piece.—
Nashia Baker,
Architectural Digest,
7 Nov. 2025
Adjective
-
Rose now realizes the smeared, dark, jagged edges are an abstract human.—
Carly Tagen-Dye,
PEOPLE,
4 Nov. 2025
-
All the shadows and jagged angles evoke German Expressionism, distorting Ronnie’s confrontation into something both surreal and terrifyingly recognizable.—
Roxana Hadadi,
Vulture,
31 Oct. 2025
Cite this Entry
“Irregular.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/irregular. Accessed 8 Jan. 2026.
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