SUPPLEMENTARY Synonyms: 64 Similar and Opposite Words

supplementary

adjective

ˌsə-plə-ˈmen-tə-rē

Definition of supplementary

as in auxiliary

available to supply something extra when needed the teacher's edition of the textbook comes with a lot of supplementary material

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in complementary

related to each other in such a way that one completes the other regards theology and philosophy as supplementary fields of study

Synonyms & Similar Words

Antonyms & Near Antonyms

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 supplementary The supplementary motor area helps organise their sequence, and the primary motor cortex sends commands to the muscles of the trunk, shoulder, arm and wrist. — Michelle Spear, Scientific American, 11 July 2026 With two satellites at supplementary inclinations, the Newtonian perturbations are equal and opposite in the two orbital planes and cancel each other out. — Jacek Krywko, ArsTechnica, 10 July 2026 The LLCs contested, arguing the alter ego finding was inapplicable and Illinois law didn't permit such piercing in supplementary proceedings. — Jay Adkisson, Forbes.com, 7 July 2026 Poetry and Original Spoken Word are considered supplementary events, Frazier said. — Evy Lewis, Chicago Tribune, 29 June 2026 See All Example Sentences for supplementary

Recent Examples of Synonyms for supplementary

Adjective

Pratt & Whitney’s Polish operations provide manufacturing and technology development capabilities for commercial and military engines, turboprops and auxiliary power units.

— Maria Mocerino, Interesting Engineering, 6 Sep. 2026
Now to see the Canes’ portal swipe, QB Darian Mensah, on the ACC’s auxiliary coast.

— Jason Kirk, New York Times, 3 Sep. 2026

Definition of auxiliary

Adjective

But the food is so good — not wow-wow, but layered with complementary flavors, seasoned with a sure hand, and utterly satisfying.

— John Kessler, Chicago Tribune, 8 Sep. 2026
The pair posed for photos at the Hotel Excelsior Venice Lido Pier during the 83rd Venice International Film Festival on Monday, wearing contrasting yet complementary shoes.

— Karla Rodriguez, Footwear News, 8 Sep. 2026

Definition of complementary

Adjective

My personal concern is especially based on the fact that their huge need for additional electricity generation could very well ruin our ability to reduce carbon emissions and avoid a climate crisis.

— Martin Kushler, Washington Post, 11 Sep. 2026
The split also means immigrants in some parts of the country are getting bail hearings while those in other places, including Texas and Louisiana, face additional hurdles to seek release.

— Arkansas Online, Arkansas Online, 11 Sep. 2026

Definition of additional

Adjective

The best professional relationships are reciprocal, not transactional.

— Expert Panel®, Forbes.com, 1 Sep. 2026
That reciprocal impact, according to Canadian officials, will purposefully target key sectors and states — like Michigan — with particular economic and political importance in the United States.

— Grant Schwab, Chicago Tribune, 31 Aug. 2026

Definition of reciprocal

Adjective

And there’s no better time than during Labor Day weekend, when some of my favorite stores are replete with accessory deals.

— Izzy Baskette, PEOPLE, 3 Sep. 2026
The property is a three-bedroom, two-bathroom single-family home in the downtown area of the city, with two separate accessory units.

— Los Angeles Times, Los Angeles Times, 30 Aug. 2026

Definition of accessory

Browse Nearby Words

supplemental

supplementary

supplementation

See all Nearby Words

Cite this Entry

Style

“Supplementary.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/supplementary. Accessed 15 Sep. 2026.

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Synonyms of supplementary

adjective

Example Sentences

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