autocratic vs peremptory

autocratic and peremptory both are adjectives.

Word	Noun	Adjective	Verb	Adverb
autocratic	No	Yes	No	No
peremptory	No	Yes	No	No

As adjectives, autocratic and peremptory are synonyms defined as:

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

Other synonyms of autocratic include bossy, dominating, high-and-mighty, magisterial.

autocratic (adjective)	peremptory (adjective)
offensively self-assured or given to exercising usually unwarranted power	putting an end to all debate or action
characteristic of an absolute ruler or absolute rule; having absolute sovereignty	offensively self-assured or given to exercising usually unwarranted power
	not allowing contradiction or refusal