Dictatorial, a.
Etymology: [Cf. F. dictatorial.]
1. Pertaining or suited to a dictator; absolute. Military powers quite dictatorial. W. Irving.
2. Characteristic of a dictator; imperious; dogmatical; overbearing; as, a dictatorial tone or manner. -- Dic`ta*to"ri*al*ly, adv. -- Dic`ta*to"ri*al*ness, n.
Shades of meaning
Fernald has no entry of its own for dictatorial; he lists it under absolute, dogmatic.
He lists it without comment; the entries above explain its neighbors.
Synonyms
absolutedogmaticarbitraryarrogantauthoritativeautocraticcoercivecommandingcompulsivecompulsorycontrollingdespoticdoctrinaldomineeringexactinghaughtyimperativeimperiousirresponsiblelordlymagisterialopinionatedoverbearingperemptorypositiveself-opinionatedsupremesystematictyrannicalunconditionalunequivocal