Synonyms of unsound

unsound

adjective

ˌən-ˈsau̇nd 

1

as in psychotic

having or showing a very abnormal or sick state of mind

disgruntled relatives tried to prove that the woman was of unsound mind when she made her will

Synonyms & Similar Words

• psychotic
• insane
• lunatic
• mad
• nuts
• mental
• crazy
• maniacal
• paranoid
• maniac
• gaga
• disturbed
• unbalanced
• irrational
• paranoidal
• strange
• whacky
• looney
• deranged
• demented
• foolish
• crazed
• cracked
• psycho
• unhinged
• loony
• cuckoo
• screwy
• eccentric
• daft
• around the bend
• ballistic
• wacky
• nutty
• whacko
• scatty
• daffy
• certifiable
• barmy
• unreasonable
• kooky
• wacko
• odd
• haywire
• batty
• loony tunes
• crackpot
• bedlam
• out to lunch
• depressed
• brainsick
• non compos mentis
• meshuga
• loco
• crackbrained
• bughouse
• moonstruck
• bonkers
• bats
• kookie
• looney tunes
• meshuggah
• disordered
• meshugah
• fruity
• hysteric
• meshugge
• out of one's mind
• distraught
• obsessed
• balmy
• delusionary
• fey
• neurotic
• schizophrenic
• distracted
• aberrant
• frantic
• delusional
• loopy
• off one's rocker
• hysterical
• queer
• cranky
• wud
• off one's gourd
• schizoid
• out of one's head
• paranoic
• off one's head
• nuclear
• paranoiac
• delirious
• off
• sociopathic
• dotty
• crackers
• tetched
• oddball
• obsessive-compulsive
• witless
• touched
• senseless
• pixilated
• pixillated
• amuck
• potty
• ape
• berserk
• monomaniacal
• teched
• frenzied
• wigged-out
• monomaniac
• amok
• raving
• fixated
• bananas

Antonyms & Near Antonyms

• sound
• rational
• reasonable
• balanced
• sane
• clear
• wise
• lucid
• sensible
• judicious
• normal
• healthy
• compos mentis
• uncrazy
• well-adjusted
• unneurotic

2

as in erroneous

not being in agreement with what is true

an unsound and pernicious stereotype

Synonyms & Similar Words

• erroneous
• inaccurate
• incorrect
• wrong
• false
• untrue
• misleading
• invalid
• inexact
• untruthful
• distorted
• off base
• specious
• deceptive
• off
• fraudulent
• fallacious
• counterfactual
• delusive
• illusory
• spurious
• unproven
• fictitious
• deceitful
• dishonest
• mendacious
• untested
• awry
• delusory
• lying
• invented
• amiss
• askew
• unconfirmed
• fabricated
• made-up
• trumped-up

Antonyms & Near Antonyms

• correct
• sound
• valid
• proper
• true
• right
• accurate
• factual
• precise
• exact
• demonstrated
• confirmed
• established
• errorless
• tested
• veracious
• perfect
• proven
• impeccable
• faultless
• flawless
• letter-perfect

3

as in unreasonable

not using or following good reasoning

it is clearly unsound to argue that just because a scientific explanation for that phenomenon does not currently exist, no such explanation is possible

Synonyms & Similar Words

• unreasonable
• irrational
• unreasoning
• illegitimate
• misleading
• weak
• illogical
• unreasoned
• absurd
• foolish
• fallacious
• invalid
• silly
• nonrational
• inconsequent
• meaningless
• inconsequential
• weird
• inconsistent
• sophistical
• unusual
• specious
• strange
• odd
• misguided
• sophistic
• nonsensical
• insane
• asinine
• unconsidered
• random
• preposterous
• disordered
• ill-advised
• disorganized
• surreal
• unconvincing
• eristic
• eristical
• half-baked
• unaccountable
• mad
• inexplicable
• whacky
• unexplainable
• nutty
• senseless
• wacky
• reasonless
• peculiar
• rambling
• Kafkaesque

Antonyms & Near Antonyms

• logical
• sound
• rational
• reasonable
• valid
• wise
• sensible
• sane
• justified
• sober
• well-founded
• reasoned
• well-grounded
• informed
• enlightened
• plausible
• solid
• clear
• just
• persuasive
• credible
• compelling
• commonsense
• certain
• organized
• cogent
• convincing
• true
• sure
• satisfying
• ordered
• demonstrated
• confirmed
• established
• substantiated
• validated
• corroborated

4

as in sick

temporarily suffering from a disorder of the body

an unsound horse that will have to be disqualified from the race

Synonyms & Similar Words

• sick
• poorly
• bad
• ill
• unhealthy
• shaky
• down
• weak
• unwell
• dizzy
• ailing
• out of sorts
• indisposed
• under the weather
• peaky
• sickened
• troubled
• peaked
• fragile
• lame
• punk
• run-down
• symptomatic
• feeble
• diseased
• disabled
• lousy
• invalid
• disordered
• sickish
• nauseous
• weakly
• cruddy
• seedy
• challenged
• queasy
• frail
• infirm
• seasick
• sickly
• woozy
• decrepit
• squeamish
• debilitated
• feverish
• nauseated
• achy
• afflicted
• qualmish
• incapacitated
• halt
• queazy
• airsick
• hypochondriacal
• carsick
• light-headed
• hypochondriac

Antonyms & Near Antonyms

• sound
• whole
• well
• healthy
• wholesome
• healthful
• conditioned
• hale
• better
• fit
• cured
• able-bodied
• strong
• improved
• recovering
• robust
• tough
• well-conditioned
• mending
• hardy
• lusty
• hearty
• rugged
• stalwart
• flourishing
• bouncing
• rehabilitated
• thriving
• flush
• chipper
• blooming
• recuperating
• convalescing

Examples of unsound in a Sentence

Recent Examples on the Web

But financial professionals caution against following advice proliferating on the social media platform that might be unsound. —Megan Cerullo, CBS News, 12 Apr. 2024

Several structural engineers found the River East at Grandview Condominiums, on Talbert Street SE, dangerous, unlivable and structurally unsound; its very foundation has for years been sinking toward a steep drop-off that slopes down toward the residential street below. —Danny Nguyen, Washington Post, 12 Feb. 2024

Keeping the building in place and doing whatever is necessary to make the structurally unsound building safe. —Sherry Greenfield, Baltimore Sun, 31 Jan. 2024

The disconcerting reality is that illusions of scientific legitimacy and flawed expert testimony are often the catalyst for deeply unsound convictions. —David Robert Grimes, Scientific American, 8 Dec. 2023