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 guerilla
Related Words
Dissimilar Words
Example Sentences
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Recent Examples of irregular
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
Brandi Jones, Health, 18 Sep. 2025
Pumping efficiency declines, arteries are less flexible, valves often show significant wear, and irregular rhythms are more frequent.
—Lauryn Higgins, Time, 17 Sep. 2025
See All Example Sentences for irregular
Adjective
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
Noun
Electrolyte imbalances may cause fatigue, muscle cramps, weakness, or an irregular heartbeat.
—Brandi Jones, Health, 18 Sep. 2025
Pumping efficiency declines, arteries are less flexible, valves often show significant wear, and irregular rhythms are more frequent.
—Lauryn Higgins, Time, 17 Sep. 2025
See All Example Sentences for irregular
Recent Examples of Synonyms for irregular
Adjective
-
Some affect people’s immune systems, while others involve the uncontrollable multiplication of abnormal lymphocytes, according to Cleveland Clinic.—
Hannah Dailey,
Billboard,
26 Sep. 2025
-
But when sepsis develops, the body's defensive measures spiral out of control, triggering widespread inflammation, abnormal blood clotting and leaky blood vessels.—
Daryl Austin,
USA Today,
25 Sep. 2025
Adjective
-
Last winter was especially dry, and the monsoon was sporadic across the state this summer with above-normal temperatures.—
Hayleigh Evans,
AZCentral.com,
25 Sep. 2025
-
Flowers nearly cover the plant in spring, followed by sporadic blooms throughout the season.—
Kim Toscano,
Southern Living,
22 Sep. 2025
Adjective
-
It’s been a rough couple of years and an uneven few weeks for the Broncos’ secondary, which often finds itself on the receiving end of criticism for surrendering big plays and big passing yards.—
Shaun Goodwin,
Idaho Statesman,
28 Sep. 2025
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For the uninitiated, navigating the uneven streets in high heels is a balancing act.—
Abbey Hudetz,
Travel + Leisure,
27 Sep. 2025
Adjective
-
Compared to their forerunners in the tsarist era, with their party congresses held abroad, their executive committees, and their active recruitment in imperial Russia’s universities, Soviet dissidents remained a comparatively small and informal conglomeration of activists.—
Benjamin Nathans
September 24,
Literary Hub,
24 Sep. 2025
-
Of those who stay, more than eighty per cent work in the informal sector—as domestic servants, street hawkers, porters, cleaners.—
Kapil Komireddi,
New Yorker,
22 Sep. 2025
Adjective
-
However, his unnatural exit from the sport made headlines in his final season at the Bahrain Grand Prix through an incident that reminded everyone about the dangers of motorsport.—
Saajan Jogia,
MSNBC Newsweek,
25 Sep. 2025
-
Imitating the speech or body language of others during a conversation is another form of masking, along with forcing eye contact or facial expressions, which may feel unnatural.—
Angelica Stabile,
FOXNews.com,
23 Sep. 2025
Adjective
-
Along the way, expect river views, a majestic fall color palette, and the occasional wildlife spotting.—
Lydia Mansel,
Travel + Leisure,
27 Sep. 2025
-
Even an occasional rodent will appear, probably the single visitor that caused the suspension of the entire operation.—
Irv Erdos,
San Diego Union-Tribune,
26 Sep. 2025
Adjective
-
With over 70,000 acres available to explore, visitors can take on the park’s 136 miles of trail, visit high alpine lakes, and climb jagged peaks.—
Evie Carrick,
Travel + Leisure,
27 Sep. 2025
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Nowadays, wig enthusiasts are shaping their lace to mimic more of a natural hairline that may include a widow’s peak, and or more jagged instead of rigid hair line, so definitely keep that customization option in mind.—
Noel Cymone Walker,
StyleCaster,
23 Sep. 2025
Adjective
-
Risher isn’t the only chief executive who throws out unconventional questions to get a deeper read on applicants.—
Preston Fore,
Fortune,
29 Sep. 2025
-
Grant also advocates for experimentation and recommends that at-home mixologists utilize unconventional flavors often.—
Essence,
Essence,
29 Sep. 2025
Cite this Entry
“Irregular.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/irregular. Accessed 2 Oct. 2025.
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