autocratic vs high-and-mighty

autocratic and high-and-mighty both are adjectives.

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

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

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

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

autocratic (adjective)	high-and-mighty (adjective)
offensively self-assured or given to exercising usually unwarranted power	offensively self-assured or given to exercising usually unwarranted power
characteristic of an absolute ruler or absolute rule; having absolute sovereignty