English Thesaurus

Synonyms of 'swear'

(verb) 
Definition
to use words considered obscene or blasphemous
It is wrong to swear and shout.
Synonyms
curse
He cursed continuously at passers-by.
,
cuss (informal)
,
blaspheme
He cursed and blasphemed to his last gasp.
,
turn the air blue (informal)
,
be foul-mouthed
,
take the Lord's name in vain
,
utter profanities
,
imprecate
(verb) 
Definition
to give evidence on oath in a law court
Alan swore that he would do everything in his power to help us.
Synonyms
vow
She vowed that some day she would return to live in France.
,
promise
They promised they would deliver it on Friday.
,
take an oath
,
warrant
The ship owner must warrant that his vessel is seaworthy.
,
testify
Several eye witnesses testified that they had seen the fight.
, ,
attest
Records attest to his long history of violence.
,
avow
a public statement avowing neutrality
,
give your word
,
state under oath
,
pledge yourself
(verb) 
Definition
to state (something) earnestly
I swear I've told you all I know.
Synonyms
declare
They declare that there is no lawful impediment to the marriage.
,
assert
We assert that the bill violates the First Amendment.
,
affirm
`The place is a dump,' she affirmed.
,
swear blind
,
asseverate (formal)

Phrasal verbs

See swear by something

Quotations

Swear not by the moon, the inconstant moon [William ShakespeareRomeo and Juliet]
As he knew not what to say, he swore [Lord ByronThe Island]

Additional synonyms

in the sense of affirm
Definition
to declare to be true
`The place is a dump,' she affirmed.
in the sense of assert
Definition
to state or declare
We assert that the bill violates the First Amendment.
in the sense of asseverate
Definition
to declare solemnly

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Video: pronunciation of 'swear'

Source

Thesaurus for swear from the Collins English Thesaurus
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