NONVALID Synonyms: 107 Similar and Opposite Words

nonvalid

adjective

ˌnän-ˈva-ləd

Definition of nonvalid

as in unreasonable

having no basis in reason or fact a nonvalid theory that most scientists rejected long ago

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in invalid

having no legal or binding force failure to inform the suspect of his rights rendered his confession nonvalid

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Recent Examples of Synonyms for nonvalid

Adjective

On the surface, paying as low as 24 cents for an hour of streaming game time doesn’t sound completely unreasonable.

— Kyle Orland, ArsTechnica, 21 Oct. 2026
If Putin rejects the framework — or, more likely, demands unreasonable changes — then the world will at least know who blocked the fledgling peace effort.

— David Ignatius, Washington Post, 21 Oct. 2026

Definition of unreasonable

Adjective

At one point, Green stops to back up Officer Thompson, who’s dealing with a driver whose temporary license plate appears to be invalid.

— Théoden Janes, Charlotte Observer, 26 Oct. 2026
Two months later, pointing to the Moreno Valley decision, the city deemed the development agreement invalid and demanded its money back.

— Los Angeles Times, Los Angeles Times, 23 Oct. 2026

Definition of invalid

Adjective

For one, null results—in this case, findings that are not unusual or revelatory—are still useful.

— Jackie Flynn Mogensen, Scientific American, 4 June 2026
However, in the face of an increasing number of null results, most notably in studies published in late 2025, most physicists now agree that this sterile neutrino doesn’t exist.

— Quanta Magazine, Quanta Magazine, 8 Apr. 2026

Definition of null

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.

Browse Nearby Words

nonuses

nonvalid

nonvenomous

See all Nearby Words

Cite this Entry

Style

“Nonvalid.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nonvalid. Accessed 27 Oct. 2026.

Copy Citation

Synonyms of nonvalid

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

milieu

Popular in Grammar & Usage

How to Use 'Who' vs. 'Whom'

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

'Affect' vs. 'Effect'

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

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

Popular in Wordplay

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

12 Lovely and Unusual Words for the Natural World

Why do we 'bury the lede?'

'Za' and 9 Other Words to Help You Win at SCRABBLE

Popular

How to Use 'Who' vs. 'Whom'

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Games & Quizzes