authoritative (adj.)
- absolute
- absolutist
- absolutistic
- accepted
- accurate
- adept
- adroit
- approved
- apt
- arbitrary
- aristocratic
- arrogant
- artistic
- ascendant
- assuring
- attested
- authentic
- authenticated
- authoritarian
- authorized
- autocratic
- binding
- bossy
- brilliant
- canonical
- cathedral
- certified
- charismatic
- charming
- clean
- clever
- cogent
- commanding
- competent
- conclusive
- confined
- confirmed
- consequential
- considerable
- consistent
- controlling
- conventional
- convincing
- coordinated
- correct
- crack
- cunning
- customary
- cute
- daedal
- decisive
- deft
- dependable
- despotic
- determinative
- dexterous
- dextrous
- dictated
- dictatorial
- didactic
- diplomatic
- doctrinaire
- documented
- dogmatic
- dominant
- domineering
- dynamic
- effective
- effectual
- efficacious
- eminent
- empowered
- enchanting
- energetic
- estimable
- evangelical
- excellent
- expert
- factual
- faithful
- fancy
- featured
- feudal
- firm
- forceful
- forcible
- formulary
- good
- goodish
- governing
- graceful
- great
- handy
- high-handed
- high-powered
- high-pressure
- high-tension
- imperative
- imperial
- imperious
- important
- impressive
- indisputable
- influential
- ingenious
- instructive
- irrefutable
- irresistible
- just
- knowledgeable
- lawful
- leading
- learned
- legal
- legitimate
- limited
- literal
- logical
- lordly
- magisterial
- magnetic
- mandatory
- masterful
- masterly
- mighty
- momentous
- neat
- official
- operative
- oppressive
- orthodox
- overbearing
- peremptory
- personable
- persuasive
- politic
- potent
- powerful
- preeminent
- prescribed
- prescriptive
- prestigious
- professional
- proficient
- prominent
- proper
- proven
- puissant
- quick
- ranking
- ready
- received
- regulation
- reliable
- repressive
- reputable
- resourceful
- restricted
- right
- ruling
- sanctioned
- satisfactory
- satisfying
- scholarly
- scriptural
- self-consistent
- senior
- severe
- skillful
- slick
- solid
- some
- sound
- specialistic
- specialized
- standard
- statesmanlike
- statutory
- strict
- striking
- strong
- stylish
- suasive
- substantial
- sufficient
- superior
- suppressive
- supreme
- sure
- tactful
- technical
- telling
- textual
- totalitarian
- traditional
- traditionalistic
- true
- true-blue
- trustworthy
- truthful
- tyrannical
- tyrannous
- valid
- validated
- verifiable
- verified
- veritable
- vigorous
- virtuoso
- vital
- weighty
- well-done
- well-founded
- well-grounded
- winning
- workmanlike
