What is another word for unsound?

Synonyms for unsound

This thesaurus page is about all possible synonyms, equivalent, same meaning and similar words for the term unsound.


  1. unsoundadjective


  2. unsoundadjective


Princeton's WordNet

  1. unsoundadjective

    not in good condition; damaged or decayed

    "an unsound foundation"

    unstable, fallacious, unfit, mentally ill, bad

    secure, sound, solid, dependable, stable, substantial, good, valid, safe, sane, healthy, reliable, strong

  2. unsoundadjective

    not sound financially

    "unsound banking practices"

    unstable, fallacious, unfit, mentally ill, bad

    sane, dependable, good, sound, substantial, healthy, safe, secure, reliable, strong, valid, stable, solid

  3. fallacious, unsoundadjective

    containing or based on a fallacy

    "fallacious reasoning"; "an unsound argument"

    mentally ill, bad, deceitful, unfit, fallacious, fraudulent, unstable

    solid, reliable, valid, sane, secure, dependable, healthy, strong, sound, good, substantial, safe, stable

  4. mentally ill, unsound, unstableadjective

    suffering from severe mental illness

    "of unsound mind"

    mentally ill, bad, unfit, fallacious, unstable, precarious, fluid

    dependable, solid, strong, safe, healthy, secure, reliable, good, valid, stable, sound, sane, substantial

  5. bad, unfit, unsoundadjective

    physically unsound or diseased

    "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"

    big, spoiled, uncollectible, risky, bad, speculative, regretful, fallacious, forged, defective, mentally ill, sorry, tough, spoilt, unstable, high-risk, unfit

    strong, good, sound, dependable, reliable, sane, solid, substantial, healthy, stable, secure, valid, safe

  6. unsoundadjective

    of e.g. advice

    unstable, fallacious, unfit, mentally ill, bad

    healthy, reliable, dependable, solid, substantial, secure, good, valid, strong, sound, safe, stable, sane

Dictionary of English Synonymes

  1. unsoundadjective

    defective, imperfect, impaired, decayed, rotten

  2. unsoundadjective

    diseased, sickly, weakly, poorly, infirm, unhealthy, morbid

  3. unsoundadjective

    erroneous, wrong, false, fallacious, incorrect, deceitful, sophistical, illogical

  4. unsoundadjective

    heterodox, heretical, not orthodox

Synonyms, Antonyms & Associated Words

  1. unsoundadjective

    defective, impaired, sophistical, fallacious, illogical, untenable

PPDB, the paraphrase database

  1. List of paraphrases for "unsound":

    unhealthy, improper, irrational

How to pronounce unsound?

How to say unsound in sign language?

Words popularity by usage frequency


How to use unsound in a sentence?

  1. Lindsay Graham:

    It's an unsound military strategy. I think it's immoral if the authorization doesn't allow for us to counter Assad's air power.

  2. Lot Chakonza:

    there are those bad practices, that reveal the mostsacred of our human nature,and such practices, as I have already implied,ar e so unsound and lamentable as not to be admitted.

  3. Thor Eells:

    When you think about it, making entry -- announced or unannounced -- is very high risk, you're going through a' fatal funnel,' where the bad guy could fire rounds blindly at a doorway and have a chance of hitting us. If we don't have to go through, we don't want to. Who benefits from making an entry ? The answer is the bad guy. So we'd say, that's a tactically unsound decision.

  4. Lindsey Graham:

    For a federal mandate to come about for measles or any other particular illness or disease you'd have to convince me it was necessary, but the question is, is there scientific evidence to justify a politician suggesting that vaccinations programs we have today are unsound? My answer is no.

  5. Justice Samuel Alito:

    Too much public discourse today is sullied by ad hominem rhetoric, that is, attempts to discredit an argument not by proving that it is unsound but by attacking the character or motives of the argument's proponents, the majority regrettably succumbs to this trend.


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"unsound." Synonyms.com. STANDS4 LLC, 2023. Web. 30 Jan. 2023. <https://www.synonyms.com/synonym/unsound>.

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    Which of the following terms is not a synonym of "spread out"?
    • A. unfold
    • B. concentrated
    • C. circularise
    • D. dissipate

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