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
Andrew Williams, Forbes.com, 29 Jan. 2026
The couplets rhyme—mostly—but his rhythms are irregular, more implicit than embodied.
—Pete Tosiello, Pitchfork, 27 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
The series has since developed into more of an all-round wellness tool, with hardware that incorporates ECG readings and irregular heart rate notifications.
—Andrew Williams, Forbes.com, 29 Jan. 2026
The couplets rhyme—mostly—but his rhythms are irregular, more implicit than embodied.
—Pete Tosiello, Pitchfork, 27 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
-
Or hold a burning incense stick around the windows and doors, and watch for any abnormal smoke movement.—
Michelle Ullman,
The Spruce,
10 Feb. 2026
-
The training also makes clear that the definition of ectopic pregnancies — which are always life-threatening — includes any that implant in an abnormal location outside of the uterine cavity.—
Cassandra Jaramillo,
CNN Money,
9 Feb. 2026
Adjective
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During Galliano’s tenure, Maison Margiela shows were sporadic.—
Miles Socha,
Footwear News,
10 Feb. 2026
-
However, sporadic light supplementation means that adjusting fertilizer use is sensible if plant growth slows.—
Gemma Johnstone,
The Spruce,
8 Feb. 2026
Adjective
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Despite substantial investment, outcomes remain uneven, and access to alternatives is often constrained by income.—
Carol Platt Liebau,
Hartford Courant,
5 Feb. 2026
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Bets on economic resilience have recently fueled gains in companies that tend to benefit from improving growth prospects, the latest data underscored the uneven labor market characterized by limited numbers of overall dismissals and lackluster hiring.—
Rita Nazareth,
Fortune,
5 Feb. 2026
Adjective
-
Anyone who survived the informal audition went on to meet judges Luke Bryan, Lionel Richie, and Carrie Underwood.—
Raechal Shewfelt,
Entertainment Weekly,
10 Feb. 2026
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Unlike the specialized literary magazine and its informal cousin, the literary blog, the general-interest newspaper has a kind of noble rapacity, an encyclopedic ambition to wrap its arms around the whole of the world.—
Becca Rothfeld,
New Yorker,
10 Feb. 2026
Adjective
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In some studies, gloves not changed between tasks had higher bacterial counts and could transfer germs just as easily as ungloved hands, underscoring the need for frequent changing and proper hand hygiene.—
Evan Moore
December 19,
Charlotte Observer,
19 Dec. 2025
Noun
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Now operating from the shadows in Colombia, Roper has been operating a massive arms-smuggling ring with the goal of rebuilding his empire and bankrolling a private guerrilla army to topple the local government.—
Max Gao,
HollywoodReporter,
3 Feb. 2026
-
Other artists of this era sought to intervene, guerrilla style, in the apparatuses of advertising, in order to shake consumers from their hypnotic slumber.—
Michael Cowan,
Artforum,
1 Feb. 2026
Adjective
-
Others forced users to pause for several seconds between words, which made the conversation feel unnatural.—
Kurt Knutsson,
FOXNews.com,
1 Feb. 2026
-
If anything, Amorim proved too defiantly wedded to his own ‘way’, a 3-4-2-1 system which had to force-fit players into unnatural roles.—
Carl Anka,
New York Times,
31 Jan. 2026
Adjective
-
Scam centers proliferating as criminal gangs flout laws In Cambodia, Laos and Myanmar, a failure to consistently enforce laws against human trafficking, labor abuses and criminal activities have allowed cyber-scam centers to flourish despite occasional crackdowns, the report noted.—
Elaine Kurtenbach,
Los Angeles Times,
5 Feb. 2026
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While occasional scooting can happen, recurring episodes usually signal an underlying issue with anal glands.—
Kasey Caminiti,
USA Today,
5 Feb. 2026
Cite this Entry
“Irregular.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/irregular. Accessed 15 Feb. 2026.
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