magisterial vs high-and-mighty

magisterial and high-and-mighty both are adjectives.

Word	Noun	Adjective	Verb	Adverb
magisterial	No	Yes	No	No
high-and-mighty	No	Yes	No	No

As adjectives, magisterial and high-and-mighty are synonyms defined as:

magisterial and high-and-mighty: offensively self-assured or given to exercising usually unwarranted power

Other synonyms of magisterial include autocratic, bossy, dominating, peremptory.

magisterial (adjective)	high-and-mighty (adjective)
of or relating to a magistrate	offensively self-assured or given to exercising usually unwarranted power
used of a person's appearance or behavior; befitting an eminent person
offensively self-assured or given to exercising usually unwarranted power