arrogant vs self-important

arrogant and self-important both are adjectives.

Word	Noun	Adjective	Verb	Adverb
arrogant	No	Yes	No	No
self-important	No	Yes	No	No

As adjectives, arrogant and self-important are synonyms defined as:

arrogant and self-important: having or showing feelings of unwarranted importance out of overbearing pride

Other synonyms of arrogant include chesty.

arrogant (adjective)	self-important (adjective)
having or showing feelings of unwarranted importance out of overbearing pride	having or showing feelings of unwarranted importance out of overbearing pride