Synonyms for Questionable

Synonyms starting with letter I

• iffy

  doubtful, certain, dubious
• improbable

  likely, unlikely, unverified
• indefinite

  ambiguous, doubtful
• indeterminate

  certain, doubtful
• indecisive

  doubtful, certain
• implausible

  unverified
• incredible
• inconclusive

  certain
• in doubt

  uncertain, controversial
• irregular

  suspicious
• in question

  controversial
• inconceivable
• impossible
• in dispute

  controversial
• insecure
• inaccurate
• impugnable
• insubstantial
• irresponsible
• indistinct
• imprecise
• inexplicit
• infamous
• inexact
• inexplicable
• illegal
• iniquitous
• incalculable
• irresolute
• inadequate
• immoral
• ill-founded
• inferior
• improbably
• inconstant
• indirect
• ill-defined
• impalpable
• improper
• irrational