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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.

Double-check your return before filing and brace yourself in case of snags.

From MarketWatch • Jan. 8, 2026

Double-check where you’ll be going, when, and with whom beforehand.

From Salon • Nov. 26, 2025

Double-check that you have chargers for everyone’s phones.

From Los Angeles Times • Aug. 18, 2023

Double-check all receipts for purchases and make sure they’re using the quality materials that they promised.

From Seattle Times • Jul. 26, 2023

Double-check for errors: Some common mistakes include not selecting the right filing status, putting down the wrong Social Security number, and underreporting income.

From Washington Post • Apr. 13, 2022