imperiousness vs overbearingness

imperiousness and overbearingness both are nouns.

Word	Noun	Adjective	Verb	Adverb
imperiousness	Yes	No	No	No
overbearingness	Yes	No	No	No

As nouns, imperiousness and overbearingness are synonyms defined as:

imperiousness and overbearingness: the trait of being imperious and overbearing

Other synonyms of imperiousness include domineeringness.

imperiousness (noun)	overbearingness (noun)
the trait of being imperious and overbearing	the trait of being imperious and overbearing