ABC(S) Synonyms: 31 Similar and Opposite Words

ABC 1 of 2

noun (1)

ˌā-(ˌ)bē-ˈsē

Definition of ABC

as in principles

usually ABC's or ABCs plural general or basic truths on which other truths or theories can be based a book on the ABCs of computer usage

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

ABC's

2 of 2

noun (2)

variants or ABCs

plural of ABC

as in basis

general or basic truths on which other truths or theories can be based a book on the ABCs of computer usage

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for ABC

Noun

The National Hurricane Center has a set number of lists, which include one pre-determined name for every letter of the alphabet, that are used on a rotational basis, according to the World Meteorological Organization (WMO).

— Kimberlee Speakman, PEOPLE, 26 Aug. 2026
The set also includes the new CASETiFY Alphabet Plushes, with a distinct plush for every letter of the alphabet, each with a different design, texture, and material.

— Laura Sirikul, Forbes.com, 20 Aug. 2026

Definition of alphabet

Noun

Pricing Happy Head’s topical solution is billed on a monthly basis, with a single bottle containing two ounces of treatment solution.

— BestReviews, Chicago Tribune, 28 Aug. 2026
Rice had a side hustle as a vintage dealer and brought in plenty of pieces from the same era, including 1950s sofas by Peter Hvidt and Orla Mølgaard-Nielsen, a pair of 1970s blue suede armchairs, and benches from France with colorful bases.

— Adriane Quinlan, Curbed, 28 Aug. 2026

Definition of basis

Noun

The writing toolkit covers keyword research, blog generation, rewriting, summarizing, grammar checks, social comments, and brand-voice creation.

— StackCommerce Team, PC Magazine, 25 Aug. 2026
Grammatical gender is an essential part of Spanish grammar and should be learned.

— BestReviews, Chicago Tribune, 24 Aug. 2026

Definition of grammar

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.

Cite this Entry

Style

“ABC.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ABC. Accessed 1 Sep. 2026.

Copy Citation

Synonyms of ABC

noun (1)

noun (2)

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster on ABC

More from Merriam-Webster

Word of the Day

conscientious

Popular in Grammar & Usage

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Is it 'nerve-racking' or 'nerve-wracking'?

What's the difference between 'fascism' and 'socialism'?

Why does English have so many silent letters?

7 Pairs of Commonly Confused Words

Popular in Wordplay

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of

Even More Words That Sound Like Insults But Aren't

Even More Bird Names that Sound Like Insults (and Sometimes Are)

12 Lovely and Unusual Words for the Natural World

Popular

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Ye Olde Nincompoop: Old-Fashioned Words for 'Stupid'

14 Phobias You Probably Haven't Heard Of

Games & Quizzes