Synonyms of doubtless

doubtless 1 of 2

adjective

as in sure

having or showing a mind free from doubt

another one of his doubtless predictions that will never come true

Synonyms & Similar Words

• sure
• confident
• assured
• certain
• positive
• implicit
• sanguine
• clear
• cocksure
• decisive
• resolute
• unhesitating
• self-assured
• unquestioning
• self-confident
• self-conceited
• unwavering
• unfaltering

Antonyms & Near Antonyms

• doubtful
• uncertain
• unsure
• dubious
• hesitant
• indecisive
• unassuming
• wavering
• vacillating
• diffident

doubtless

2 of 2

adverb

1

as in certainly

without any question

she is doubtless the one and only girl for me

Synonyms & Similar Words

• certainly
• surely
• definitely
• sure
• probably
• clearly
• undoubtedly
• likely
• really
• assuredly
• easily
• unquestionably
• for certain
• so
• truly
• indeed
• damn well
• undeniably
• indisputably
• plainly
• perhaps
• possibly
• obviously
• by all means
• incontestably
• for sure
• inarguably
• all right
• unarguably
• forsooth
• alright
• conceivably
• incontrovertibly
• by all odds
• hands down
• unmistakably

2

as in probably

by reasonable assumption

doubtless you have heard this story before, but I'll tell it anyway

Synonyms & Similar Words

• probably
• likely
• perhaps
• maybe
• surely
• presumably
• definitely
• certainly
• definitively
• possibly
• undoubtedly
• assumably
• like as not
• as like as not
• practically
• clearly
• reasonably
• conceivably
• potentially
• plausibly
• assuredly
• unquestionably
• positively
• mayhap
• undeniably
• indisputably
• perchance
• supposedly
• imaginably
• conclusively
• indubitably
• decisively
• really
• truly
• presumedly
• supposably

Antonyms & Near Antonyms

• improbably
• incredibly
• unbelievably
• inconceivably
• implausibly
• unthinkably