What is another word for unsound?

Need synonyms for unsound? Here's a list of similar words from our thesaurus that you can use instead.

Adjective
Not based on sound or reliable evidence or reasoning
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“The theoretical arguments claiming that the hypothesis is unsound misunderstand the nature of the hypothesis.”
Adjective
Lacking in accuracy or truth
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“Giorgio's claims about ancient aliens are completely unsound and should be dismissed entirely.”
Adjective
Physically or structurally not safe or robust
“The beams of the house were rickety and unsound, and the site was entirely overgrown.”
Adjective
Mentally deranged or unbalanced
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“Perhaps Danielle's insistence that the meeting had never taken place had left her feeling that others may judge her to be mentally unsound.”
Adjective
Somewhat ill or not fully physically healthy
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“The disease is transmissible and may spread from this unsound animal to the other members of the herd.”
Adjective
Likely to have adverse consequences
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Adjective
Lacking sense or sound reasoning
Adjective
Frail, sickly or of a delicate constitution
Adjective
Lacking in a required or necessary quality
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Adjective
Showing a lack of prudence or common sense
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Adjective
Not convincing, plausible or believable
Adjective
Of lower quality
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Adjective
Impractical and foolishly idealistic
Adjective
Having fallen into a state of disrepair or deterioration, especially through neglect
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Adjective
Organically decayed or broken down
Adjective
(of a person) Unable to think clearly
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Adjective
Characterized by an abnormal and unhealthy interest in disturbing and unpleasant subjects, especially death and disease
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Adjective
Not conforming with accepted or orthodox standards or beliefs
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Adjective
Small and weak
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Adjective
Not characterized by or conducive to health or moral well-being
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Adjective
Flimsy, or made of flimsy material
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Adjective
Having no legal or binding force; invalid
Adjective
Likely to change suddenly and create difficulties or danger
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Adjective
Perverted
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