English Thesaurus

Synonyms of 'invalid'

(noun) 
Definition
a person who is disabled or chronically ill
I hate being treated as an invalid.
Synonyms
patient
She specializes in the treatment of cancer patients.
,
sufferer
, ,
(adjective) 
Definition
having no legal force
The trial was stopped and the results declared invalid.
Synonyms
null and void
,
void
The elections were declared void by the former military ruler.
, , , ,
not binding
,
inoperative
The mine has been inoperative since May last year.
,
nugatory
The Stamp Act of 1765 was rendered nugatory by colonial resistance.
Opposites
(adjective) 
Definition
(of an argument, result, etc.) not valid because it has been based on a mistake
Those arguments are rendered invalid by the hard facts.
Synonyms
unfounded
The allegations were totally unfounded.
,
false
This resulted in false information being entered.
,
untrue
The allegations were completely untrue.
,
illogical
his completely illogical arguments
,
irrational
an irrational fear of science
,
unsound
The thinking is muddled and fundamentally unsound.
,
unscientific
,
baseless
The government has described the reports as completely baseless.
,
fallacious
Their argument is fallacious.
,
untenable
He claimed the charges against him were untenable.
,
Opposites

Additional synonyms

in the sense of ailing
Definition
unwell or unsuccessful over a long period
I stopped working to care for my ailing mother.
Synonyms
ill,
poorly (informal),
crook (Australian, New Zealand, informal),
debilitated,
off colour,
under the weather (informal),
in the sense of baseless
Definition
not based on fact
The government has described the reports as completely baseless.
Synonyms
fabricated,
unconfirmed,
unproven,
unsupported,
without foundation,
uncorroborated,
ungrounded,
without basis
in the sense of fallacious
Their argument is fallacious.

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English Translation of "invalid"
English Translation of "invalid"
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Video: pronunciation of 'invalid'

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Thesaurus for invalid from the Collins English Thesaurus
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