Synonyms for Authoritatively:

• adv

  •authoritatively (adverb)
  • masterfully.

• adv.

  •all (adverb)
  • authoritatively,
  • magisterially.
  •authoritatively (adverb)
  • powerfully,
  • autocratically,
  • dictatorially,
  • arrogantly,
  • impressively,
  • importantly,
  • consequentially,
  • effectively,
  • influentially,
  • effectually.
  •expertly (adverb)
  • professionally,
  • skillfully,
  • artistically,
  • sophisticatedly,
  • adroitly,
  • adeptly,
  • expertly.
  •influentially (adverb)
  • motivationally,
  • supremely,
  • prejudicially,
  • predominantly.
  •officially (adverb)
  • Approvedly.
  •powerfully (adverb)
  • mightily,
  • potently,
  • energetically,
  • vigorously,
  • competently,
  • strongly,
  • forcefully.
  •sagaciously (adverb)
  • masterly,
  • philosophically,
  • intellectually,
  • wisely,
  • brilliantly,
  • sagaciously,
  • intelligently.

• n.

  •authoritatively (noun)
  • with authority.

• Other synonyms:

  •
  • ex officio.
  •Other relevant words:
  • legitimately,
  • authoritative,
  • Authenticly,
  • highly,
  • departmentally,
  • truly,
  • reliably,
  • dependably,
  • trustworthily,
  • certainly,
  • sanctioned,
  • classically,
  • peremptorily,
  • crucially,
  • unequivocally,
  • validly,
  • authentically,
  • absolutely,
  • truely,
  • Definitively,
  • standardly,
  • Executively,
  • haughtily,
  • dominantly,
  • overbearingly,
  • Determinately,
  • well,
  • administratively.

Antonyms for Authoritatively:

• adv.

  • officially
    informally, unceremoniously, casually.