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What is another word for invalid?

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

Contexts ▼

Lacking in accuracy or truth

Not based on logic or reason

In poor health, especially regularly or chronically

Not legally valid or binding

(of a falsehood) Concocted to deceive others

Not supported or proven by evidence

Deprived of the ability to perform natural physical activities

Showing a lack of common sense

Not working or taking effect

Not admissible, especially as evidence or as an argument

No longer in use or existing

Not having a sound state of mind

A person made weak or disabled by illness or injury

A person who is physically limited by age, illness or injury

A person who is unduly anxious about their health

To disable (someone) by injury or illness

(chiefly British) To exempt from duty because of injury or ill-health

… more ▼

Adjective

Lacking in accuracy or truth

unsubstantiated

wide of the mark

wrongly inferred

without foundation

not trustworthy

out of commission

on the wrong track

more ❯

“Keynes also makes an invalid argument, claiming that a fall in the nominal wage rate may not decrease the real wage rate but would rather increase the rate of unemployment.”

Adjective

Not based on logic or reason

inconsequential

self-contradictory

wrongly deduced

wrongly inferred

unsubstantiated

counterintuitive

won't hold water

without foundation

not making sense

beyond the bounds of possibility

out of the question

incomprehensible

out of the ordinary

not worth considering

ill-thought-out

not to be thought of

hard to swallow

worthy of scorn

extremely foolish

not well thought out

stupidly irresponsible

taking the cake

feather-brained

off your trolley

beyond all reason

out of all reason

not to be considered

highly undesirable

off beaten path

never to be forgotten

out of this world

hardly possible

like herding cats

contrary to reason

highly unlikely

beyond the realm of reason

not remotely possible

imcomprehensible

extremely implausible

extremely unlikely

extremely doubtful

extremely difficult to believe

not in the least likely

scarcely credible

more ❯

“A conclusion you presume to be true may be based on invalid reasoning.”

Adjective

In poor health, especially regularly or chronically

on the sick list

under the weather

hospitalized^US

under medication

hospitalised^UK

in poor condition

out of condition

chronically ill

not up to snuff

not in good shape

green about the gills

the worse for wear

not feeling well

at death's door

confined to bed

out of commission

like death warmed up

green at the gills

about to throw up

not a hundred percent

slightly unwell

hypochondriacal

green around the gills

experiencing nausea

feeling nauseous

feeling nauseated

sick as a parrot

not up to the mark

as white as a ghost

as white as a sheet

not feeling up to snuff

running temperature

feeling terrible

suffering from motion sickness

suffering from altitude sickness

green around gills

on your last legs

with sunken cheeks

rabies-infected

foaming at the mouth

more ❯

“I have gone from an active and healthy individual to an invalid sufferer of every bad symptom bar nausea.”

Adjective

Not legally valid or binding

“He claimed the raid had been illegal as an invalid warrant had been used.”

Adjective

(of a falsehood) Concocted to deceive others

misrepresentative

economical with the truth

contrary to fact

unsubstantiated

without foundation

devoid of validity

not what it is cracked up to be

terminologically inexact

unauthenticated

unstraightforward

seemingly correct

plausible but wrong

apparently right

dishonourable^UK

dishonorable^US

against the law

more ❯

Adjective

Not supported or proven by evidence

unsubstantiated

without foundation

open to question

not backed up by evidence

hard to believe

without justification

unauthorized^US

unauthorised^UK

without explanation

without substantiation

based on guesswork

unauthenticated

disproportionate

more ❯

Adjective

Deprived of the ability to perform natural physical activities

wheelchair-using

learning-disabled

differently abled

having a disability

physically challenged

physically handicapped

physically impaired

out-of-commission

having special needs

with a disability

physically disabled

out of commission

confined to bed

wheelchair-bound

more ❯

Adjective

Showing a lack of common sense

soft in the head

thick as two short planks

slow on the uptake

not the full shilling

feather-brained

dead from the neck up

mentally deficient

as thick as two short planks

not intelligent

mentally handicapped

uncomprehending

foolishly stupid

without thought

more ❯

Adjective

Not working or taking effect

not functioning

not in working order

out of commission

non-functioning

on its last legs

non-operational

not in operation

unavailable for use

in a state of disrepair

in need of repair

given up the ghost

stopped working

gone to rack and ruin

falling to pieces

down for the count

badly maintained

poorly maintained

dead and buried

gone to the wall

dead in the water

in poor condition

out of circulation

out of business

more ❯

Adjective

Not admissible, especially as evidence or as an argument

Adjective

No longer in use or existing

out of commission

dead and buried

over and done with

consigned to oblivion

ancient history

a thing of the past

fallen into disuse

no longer in use

down memory lane

sunk in oblivion

more ❯

Adjective

Not having a sound state of mind

non compos mentis

sick in the head

of unsound mind

away with the fairies

foaming at the mouth

mad as a hatter

stark raving mad

nutty as a fruitcake

stark staring mad

have a screw loose

not right in the head

off your rocker

have bats in the belfry

out of one's mind

round the twist

have kangaroos in the top paddock

mad as a March hare

not quite right in the head

not right upstairs

as daft as a brush

not the full shilling

off your trolley

around the bend

off one's gourd

with a screw loose

crazy as a loon

not in your right mind

one card shy of a full deck

a few cards shy of a full deck

a few sandwiches short of a picnic

psychopathological

off the deep end

daft as a brush

out of one's head

not of sound mind

severely mentally ill

soft in the head

touched in the head

beside yourself

out of one's gourd

manic-depressive

in another world

mentally deranged

having bats in the belfry

deprived of one's wits

having a screw loose

having kangaroos in the top paddock

severely mentally disordered

disorganized^US

mentally incompetent

out of your mind

as mad as a hatter

out of one's tree

two sandwiches short of a picnic

as mad as a March hare

one sandwich short of a picnic

disorganised^UK

slow on the uptake

thick as two short planks

not quite right

through the roof

not functioning properly

out of commission

mentally unbalanced

out of one's skull

like one possessed

driven to distraction

out of one's wits

more ❯

Noun

A person made weak or disabled by illness or injury

“In another tale, a boy who has come to the kibbutz under tragic circumstances wishes to visit his father, an invalid, at a hospital.”

Noun

A person who is physically limited by age, illness or injury

Noun

A person who is unduly anxious about their health

malade imaginaire

obsessive person

hypochrondriast

Verb

To disable (someone) by injury or illness

put out of action

put on the sick list

clip one's wings

cause injury to

tear limb from limb

more ❯

“The passenger was invalided with the dreaded disease.”

Verb

(chiefly British) To exempt from duty because of injury or ill-health

grant sick leave

exempt from duty

remove from active service

put on the sick list

“Rowley told Waller and Procter that he would go home if Dr. Meller would invalid him.”

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