Consider extraneous, "Not belonging to, or dependent upon, a thing; without or beyond a thing; foreign", and synonyms like superfluous ("in excess of what is required or sufficient") or pleonastic ("Using an excessive number of words"). Other synonyms of superfluous include excessive, extra, supernumerary, surplus, unnecessary, extravagant, some of which apply.
Answer from James Waldby - jwpat7 on Stack ExchangeMerriam-Webster
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USELESS Synonyms: 108 Similar and Opposite Words | Merriam-Webster Thesaurus
Synonyms for USELESS: impractical, unusable, unsuitable, unworkable, impracticable, unserviceable, inoperable, unavailable; Antonyms of USELESS: useful, practical, feasible, usable, functional, applicable, operational, workable
Thesaurus.com
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USELESS Synonyms & Antonyms - 118 words | Thesaurus.com
Find 118 different ways to say USELESS, along with antonyms, related words, and example sentences at Thesaurus.com.
WordHippo
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What is another word for useless? | Useless Synonyms - WordHippo Thesaurus
Synonyms for useless include ineffectual, impractical, futile, hopeless, ineffective, pointless, inefficacious, unproductive, worthless and inutile. Find more similar words at wordhippo.com!
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Consider extraneous, "Not belonging to, or dependent upon, a thing; without or beyond a thing; foreign", and synonyms like superfluous ("in excess of what is required or sufficient") or pleonastic ("Using an excessive number of words"). Other synonyms of superfluous include excessive, extra, supernumerary, surplus, unnecessary, extravagant, some of which apply.
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My preference in this instance would be to use either prejudicial or detrimental as they convey the sense of 'harmful' as requested.
WordReference
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useless - WordReference.com English Thesaurus
useless - WordReference thesaurus: synonyms, discussion and more. All Free.
Vocabulary.com
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Useless - Definition, Meaning & Synonyms | Vocabulary.com
Less means "without." So something that is useless has no use or value, at least at the present time. Long ago, many blacksmiths concluded it was useless to try to get by making horseshoes after the automobile caught on. Their tools and supplies? Useless, so they thought.
Collins Dictionary
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USELESS Synonyms | Collins English Thesaurus
Synonyms for USELESS in English: worthless, of no use, valueless, pants, ineffective, impractical, fruitless, unproductive, ineffectual, unworkable, …
Cambridge Dictionary
dictionary.cambridge.org › thesaurus › useless
USELESS - 67 Synonyms and Antonyms - Cambridge English
This knife is useless for cutting bread. It's useless to speculate what might have been. ... Synonyms for useless from Random House Roget's College Thesaurus, Revised and Updated Edition © 2000 Random House, Inc.
Thesaurus.com
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WORTHLESS Synonyms & Antonyms - 111 words | Thesaurus.com
barren bogus futile inconsequential ineffective insignificant meaningless mediocre pointless unimportant unproductive unprofitable unusable useless
Merriam-Webster
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USELESSNESS Synonyms: 59 Similar and Opposite Words | Merriam-Webster Thesaurus
Synonyms for USELESSNESS: futility, ineffectiveness, inefficacy, ineffectuality, defeat, collapse, inadequacy, failure; Antonyms of USELESSNESS: success, achievement, accomplishment, victory, win, relevance, connection, applicability
Dictionary.com
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USELESS Definition & Meaning | Dictionary.com
Synonyms: unusable, unserviceable · useless British · / ˈjuːslɪs / having no practical use or advantage · informal ineffectual, weak, or stupid · he's useless at history "Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co.
YourDictionary
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Useless Synonyms: 65 Synonyms and Antonyms for Useless | YourDictionary.com
Synonyms for USELESS: futile, ineffectual, vain, inutile, unavailing, unusable, fruitless, worthless, unprofitable; Antonyms for USELESS: efficient, usable, operative, useful, usable, valuable, helpful, working, worthwhile.
Collins Dictionary
collinsdictionary.com › dictionary › english › useless
USELESS definition and meaning | Collins English Dictionary
He was useless at any game with a ball. [+ at] Synonyms: inept, no good, hopeless [informal], weak More Synonyms of useless
Published March 26, 2018
Thesaurus.com
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OF NO USE Synonyms & Antonyms - 58 words | Thesaurus.com
useless · Synonyms · STRONGEST · counterproductive fruitless futile hopeless idle impractical incompetent ineffective ineffectual inoperative meaningless no good pointless stupid unproductive unworkable worthless ·
Quora
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What are some good synonyms for 'useless'? - Quora
Answer (1 of 3): Allowing procurement to control what other people are allowed to buy when there is a clear conflict of interest. Not only having professional relationship with me. By allowing phygial: the divide of physical and digital world. Sourcing or selling me a raw material. The risk is t...
Appewa
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Useless - Synonyms, Antonyms and Etymology | EWA Dictionary
"Go on the Useless Presents."However, you did see her, and that is useless now.So everything I have done is useless.
Cambridge Dictionary
dictionary.cambridge.org › thesaurus › articles › useless
USELESS - Cambridge English Thesaurus article page
The opposite of useless is useful.
Oreate AI
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Useless Synonym - Oreate AI Blog
January 7, 2026 - You might look around and think, “This is all so useless.” The term encapsulates more than just physical objects; it reflects feelings of frustration when efforts yield no results. In this context, synonyms like impractical and unusable come ...
Free Thesaurus
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Useless synonyms, useless antonyms - FreeThesaurus.com
Synonyms for useless in Free Thesaurus. Antonyms for useless. 50 synonyms for useless: worthless, of no use, valueless, pants, ineffective, impractical, fruitless, unproductive, ineffectual, unworkable, disadvantageous.... What are synonyms for useless?
Power Thesaurus
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USELESS Synonyms: 2 038 Similar Words & Phrases
Find 2 038 synonyms for Useless to improve your writing and expand your vocabulary.