overbearingness vs imperiousness

overbearingness and imperiousness both are nouns.

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

As nouns, overbearingness and imperiousness are synonyms defined as:

overbearingness and imperiousness: the trait of being imperious and overbearing

Other synonyms of overbearingness include domineeringness.

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