go bail
bet one's bottom dollar
betcha
100 percent
certainly
bet the farm
flatly
guarantee
insure
secure
assure
ensure
sureness
bet one's boots
likely
in all likelihood
probably
in all probability
belike
cinch
bet
confident
positively
certitude
stonewall
cert
foregone conclusion
certainty
sure thing
hyperprecise
superconfident
confirmably
I wis
rely on
clear
convinced
gtd
clearly
positive
superprecise
ultraprecise
ascertainable
assuredly
sure as shit
sure as fate
sure as shooting
believe me
make no mistake
sure as the world
know inside and out
sure as sugar
I'll be bound
undoubting
confirm plus chop
lay odds
make book
one hundred percent
feel up to
convincingly
all very well
strong
factum
no doubt
self-assuredly
superexact
safe in the knowledge
precisely
preconfirm
easily
indubitability
doubtlessly
safe bet
undoubtedly
doubtless
plainly
ultraconfident
home and dry
certifiably
critically
undoubtfully
take account
know whether one is Arthur or Martha
by all means
definitely
look
sure as a gun
appreciate
guaranteeably
ostensive
damn straight
100 percent
confident
stonewall
hyperprecise
superconfident
convinced
gtd
positive
superprecise
ultraprecise
ascertainable
sure as shooting
undoubting
one hundred percent
all very well
strong
superexact
safe in the knowledge
ultraconfident
home and dry
ostensive
certainly
flatly
likely
in all likelihood
probably
in all probability
belike
positively
confirmably
I wis
clear
clearly
assuredly
sure as shit
sure as fate
sure as the world
sure as sugar
confirm plus chop
convincingly
no doubt
self-assuredly
precisely
easily
doubtlessly
undoubtedly
doubtless
plainly
certifiably
critically
undoubtfully
by all means
definitely
sure as a gun
guaranteeably
sureness
bet
certitude
cert
foregone conclusion
certainty
sure thing
factum
indubitability
safe bet
bet one's bottom dollar
bet the farm
guarantee
insure
secure
assure
ensure
bet one's boots
cinch
bet
rely on
know inside and out
lay odds
make book
feel up to
preconfirm
take account
know whether one is Arthur or Martha
look
appreciate
English words for 'To be absolutely sure of something'
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