surest
Least likely wrong
Surest is the superlative of sure—the most certain, reliable, or confident.
The surest path to success is the one most likely to work.
The surest sign of trouble leaves no doubt.
She was the surest shot on the team.
Consistently performing as expected
- dependableWorthy of trust
- trustworthyWorthy of confidence
- unfailingNever failing or weakening
- provenEstablished as fact
tested · tried-and-true · consistent · steadfast · solid · stable · sound · safe
Least likely to cause harm
- bestHighest in quality
- quickestMost rapid in speed
- fastestMost rapid of all
- foolproofIncapable of failure
guaranteed · proven · tested · optimal · soundest · wisest · smartest
Free from doubt
- absoluteTotal, without qualification
- definiteClearly established, not vague
- undeniableImpossible to contradict
- indisputableImpossible to contest
unquestionable · conclusive · incontrovertible · irrefutable · positive · inevitable · foolproof · infallible
Sure of oneself
- poisedCalm and controlled
- composedCalm and self-possessed
- boldCourageous and daring
- certainFree from doubt
unhesitating · self-possessed · secure · convinced · trusting · believing · optimistic · positive
Firmly loyal, unshakeable
- unwaveringSteady and unchanging
- resoluteFixed in purpose
- determinedFirmly committed to purpose
- unflinchingRefusing to show fear
unyielding · unshakeable · firm · unswerving · persistent · tenacious · dogged · committed
reliable
Consistently performing as expected
- dependableWorthy of trust
- trustworthyWorthy of confidence
- unfailingNever failing or weakening
proven · tested · tried-and-true · consistent · steadfast · solid · stable · sound · safe · secure
safest
Least likely to cause harm
foolproof · guaranteed · proven · tested · optimal · soundest · wisest · smartest
certain
Free from doubt
- absoluteTotal, without qualification
- definiteClearly established, not vague
- undeniableImpossible to contradict
indisputable · unquestionable · conclusive · incontrovertible · irrefutable · positive · inevitable · foolproof · infallible · unmistakable
confident
Sure of oneself
certain · unhesitating · self-possessed · secure · convinced · trusting · believing · optimistic · positive · unshakeable
steadfast
Firmly loyal, unshakeable
- unwaveringSteady and unchanging
- resoluteFixed in purpose
- determinedFirmly committed to purpose
unflinching · unyielding · unshakeable · firm · unswerving · persistent · tenacious · dogged · committed · dedicated
- make sureVerify something is certain
- not sureState of doubt
- sure thingGuaranteed outcome or agreement
- for sureExpressing complete certainty
- making sureConfirming something is so
- made sureConfirmed something would happen
sure, unsure, assured, ensure, insure, reassure, assure, ensured, insured