に違いない[nichigainai] I am sure
違い[chigai] difference
違う[chigau] to differ (from)
違える[chigaeru] to change
違憲[iken] unconstitutionality

違算[isan] miscalculation
違式[ishiki] informality
違背[ihai] violation
違犯者[ihansha] violator (of a law)
違犯[ihan] violation (of law)