English Thesaurus

Synonyms of 'faulty'

(adjective) 
Definition
badly designed or not working properly
They will repair the faulty equipment.
Synonyms
defective
Retailers can return defective merchandise.
,
damaged
,
not working
,
malfunctioning
,
broken
a broken guitar and a rusty snare drum
,
bad
Many old people are living in bad housing.
,
flawed
the unique beauty of a flawed object
,
impaired
The blast left him with permanently impaired vision.
,
imperfect
We live in an imperfect world.
,
blemished
,
out of order
The espresso machine is out of order.
,
on the blink
an old TV that's on the blink
,
buggy (a computer)
(adjective) 
Their interpretation was faulty.
Synonyms
incorrect
He denied that his evidence was incorrect.
,
wrong
That was the wrong answer – try again.
,
flawed
The tests were seriously flawed.
,
inaccurate
The reports were based on inaccurate information.
, ,
weak
His eyesight had always been weak.
,
invalid
Those arguments are rendered invalid by the hard facts.
,
erroneous
The conclusions they have come to are completely erroneous.
,
unsound
The thinking is muddled and fundamentally unsound.
, ,
fallacious
Their argument is fallacious.

Additional synonyms

in the sense of bad
Definition
not good
Many old people are living in bad housing.
Synonyms
duff (British, informal),
low-rent (informal),
two-bit (slang),
crappy (slang),
end-of-the-pier (British, informal),
poxy (slang),
dime-a-dozen (informal),
piss-poor (slang),
bush-league (Australian, New Zealand, informal),
tinhorn (US, slang),
half-pie (New Zealand, informal),
bodger or bodgie (Australian, slang),
strictly for the birds (informal)
in the sense of broken
Definition
not functioning
a broken guitar and a rusty snare drum
Synonyms
not working,
not functioning,
on the blink (slang),
on its last legs,
kaput (informal)
in the sense of erroneous
Definition
based on or containing an error or errors
The conclusions they have come to are completely erroneous.

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

Source

Thesaurus for faulty from the Collins English Thesaurus
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