boringness vs insipidness

boringness and insipidness both are nouns.

Word	Noun	Adjective	Verb	Adverb
boringness	Yes	No	No	No
insipidness	Yes	No	No	No

As nouns, boringness and insipidness are synonyms defined as:

boringness and insipidness: extreme dullness; lacking spirit or interest

Other synonyms of boringness include dreariness, insipidity.

boringness (noun)	insipidness (noun)
extreme dullness; lacking spirit or interest	lacking any distinctive or interesting taste property
	extreme dullness; lacking spirit or interest