Thesaurus.com
Dictionary.com
Definitions

double-check

VERB
ascertain
Synonyms
STRONGEST
confirm determine divine find out verify
STRONG
check dig discover establish eye eyeball fix identify learn peg read see settle size tell
WEAK
catch on check out check up on get down cold get down pat get hold of get it down get the hang of learn the ropes make certain make sure pick up pick up on size up
Antonyms
STRONGEST
disprove invalidate
STRONG
aid assist confuse destroy help ignore look away miss misunderstand neglect overlook unsettle
VERB
confirm
Synonyms
STRONGEST
affirm approve back certify corroborate endorse establish explain sign substantiate support uphold verify
STRONG
attest authenticate bless buy check circumstantiate debunk justify okay sanction settle subscribe underpin vouch warrant witness
WEAK
bear out check out give green light give high sign give stamp of approval give the go-ahead give the nod lap up make good make sure rubber-stamp sign off on size up thumbs-up
Antonyms
STRONGEST
confuse contradict deny disallow disapprove discredit disprove invalidate oppose refuse reject
STRONG
disagree refute veto
WEAK
annul cancel destroy repudiate void
VERB
corroborate
Synonyms
STRONGEST
authenticate confirm justify substantiate validate verify
STRONG
approve certify document endorse establish okay prove ratify strengthen support sustain
WEAK
bear out check on check out check up declare true give nod rubber-stamp
Antonyms
STRONGEST
disprove invalidate veto
STRONG
contradict deny disagree disapprove discredit oppose refuse reject
WEAK
disallow disclaim refute
VERB
reiterate
Synonyms
STRONGEST
echo renew repeat restate
STRONG
ditto ingeminate iterate recap recapitulate rehash reprise retell
WEAK
come again go over again play back recheck resay rewarn say again
Antonyms
WEAK
take back
VERB
verify
Synonyms
STRONGEST
authenticate certify check corroborate demonstrate establish find out justify prove substantiate
STRONG
attest debunk document eye eyeball peg settle size support test try
WEAK
add up bear out check out check up check up on hold up make certain make sure pan out size up stand up
Antonyms
STRONGEST
conceal confuse contradict deny discredit disprove hide invalidate reject

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He suggested airline passengers double check with their airline to make sure their reservation is intact.

From MarketWatch • Apr. 28, 2026

Moreover, workers may also have outsize expectations around AI’s automation capabilities, with many of the current tools still requiring workers to double check the completed work for errors.

From Barron's • Mar. 27, 2026

Last year one of its accounts posted a video inside the REI Soho bathroom to double check it was still open and provided free menstrual products to visitors.

From The Wall Street Journal • Oct. 17, 2025

If you've recently stocked up on cold and flu medicine, you may want to double check what brand you've purchased — especially if you're a Costco shopper.

From Salon • Jan. 15, 2025

As a double check, however, both men were questioned on this point.

From The Report on Unidentified Flying Objects by Ruppelt, Edward J.