Doubtless antonyms | adjectives

Antonyms for Doubtless as a Adjective

• dubious

  certainly
• uncertain

  certainly
• doubtful
• unsure
• unauthenticated
• fly by night
• apocryphal
• touch and go
• unassured
• trustless
• ungenuine
• untrusty
• unconvinced
• hesitant
• indecisive
• vacillating
• wavering
• diffident
• unassuming