SUPPLEMENT Synonyms: 102 Similar and Opposite Words

supplement 1 of 2

noun

ˈsə-plə-mənt

Definition of supplement

as in increase

something added (as by growth) this new rule restricting e-mail to job-related activity is only a supplement to the preexisting policy regarding personal use of company resources

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in complement

something that serves to complete or make up for a deficiency in something else recommends taking a vitamin C supplement to prevent colds

Synonyms & Similar Words

as in appendix

a part added at the end of a book or periodical a supplement containing biographical articles on women who had died since the publication of the original three-volume encyclopedia

Synonyms & Similar Words

Antonyms & Near Antonyms

supplement

2 of 2

verb

as in to complement

Related Words

Dissimilar Words

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 supplement

Noun

Why collagen, in the first place Collagen is one of the rare supplements that doctors will actually recommend. — Maggie Ryan, Flow Space, 16 July 2026 If a patient is running too high, usually from supplements or too big a dose, the fix is to cut back and let the body recalibrate. — Dr. Jamin Brahmbhatt, CNN Money, 16 July 2026

Verb

And only about half of private-sector workers participate in the workplace retirement plans that are supposed to supplement Social Security. — Daniel De Visé, USA Today, 16 July 2026 With fewer affordable options available and wages not keeping pace with the high prices, teachers often live outside of the district or take on additional jobs to supplement their income, Black said. — Taylor O'Connor 15, Kansas City Star, 15 July 2026 See All Example Sentences for supplement

Recent Examples of Synonyms for supplement

Noun

June was the deadliest month for Ukrainian civilians since April 2022, the United Nations said this week – an increase driven by long-range Russian missiles that have struck urban residential buildings.

— Tim Lister, CNN Money, 16 July 2026
That hugely successful group also helped drive other major changes in the nation’s music-consumption habits, like an increase in CD sales.

— Maya Georgi, Rolling Stone, 16 July 2026

Definition of increase

Noun

Sauces complement proteins, elevate vegetables and season grains.

— Lynda Balslev, Mercury News, 14 July 2026
Rather than predicting a specific outcome, the letter calls for more research, as well as new incentives, guardrails, and institutions to ensure AI complements human workers and benefits society.

— Jeremy Kahn, Fortune, 14 July 2026

Definition of complement

Noun

Peter the Great’s dream The Sea of Azov is an inland sea that sits between the southern shores of Ukraine and Russia, a kind of an appendix to the bigger Black Sea.

— Ivana Kottasová, CNN Money, 15 July 2026
The film’s story, much of it developed from Tolkien’s appendices, is set between The Hobbit and The Fellowship of the Ring.

— Tom Tapp, Deadline, 14 July 2026

Definition of appendix

Noun

Try a trend-forward pair of glove flats to give your look an elevated boost, transforming your slouchy bottoms from low-key to downtown chic.

— India Roby, Glamour, 15 July 2026
For formal events, heels from Kate Spade, Christian Louboutin, Jimmy Choo and Steve Madden, usually featuring a platform sole to offer her a boost.

— Amina Ayoud, Footwear News, 15 July 2026

Definition of boost

Noun

One way to begin is with the mental and physical reset provided by the Crossings Ceremony, the most recent addition to Miraval Austin’s Life in Balance Spa offerings.

— Robb Report Studio, Robb Report, 16 July 2026
The coaching staff thought the talent the team inherited, with the addition of a few bargain signings, was better than the numbers showed.

— Danielle Allentuck, Washington Post, 16 July 2026

Definition of addition

Noun

Issues of potential fertility decline in this male population also need to be addressed, as well as signs of high testosterone including sleep issues, excess body hair, liver disease, weight gain and mood disorders.

— Nina Shapiro, Forbes.com, 18 July 2026
But without housing, any gains from those programs could be short-lived, Montalvo said.

— Amber Gaudet July 18, Charlotte Observer, 18 July 2026

Definition of gain

Noun

The local extension office should have a list of plants recommended for your region.

— Brandee Gruener, Southern Living, 19 July 2026
And data from CartHappy, which tracks grocery prices via Chrome extension, shows Walmart changed prices more than 1,000 times on its Great Value half-gallon ice creams over the past two weeks despite only selling seven flavors.

— Isabelle LaBianco, CNN Money, 19 July 2026

Definition of extension

Browse Nearby Words

supple

supplement

supplemental

See all Nearby Words

Cite this Entry

Style

“Supplement.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/supplement. Accessed 20 Jul. 2026.

Copy Citation

Synonyms of supplement

noun

verb

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster on supplement

More from Merriam-Webster

Word of the Day

raffish

Popular in Grammar & Usage

Merriam-Webster’s Great Big List of Words You Love to Hate

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Do you 'say your piece' or 'say your peace'?

Why is '-ed' sometimes pronounced at the end of a word?

Commonly Misspelled Words

Popular in Wordplay

14 Phobias You Probably Haven't Heard Of

It's a Scorcher! Words for the Summer Heat

The Longest Long Words List

Ten Words Ending with a Silent ‘T’

Why do we say 'fly off the handle'?

Popular

Merriam-Webster’s Great Big List of Words You Love to Hate

14 Phobias You Probably Haven't Heard Of

It's a Scorcher! Words for the Summer Heat

Games & Quizzes