importunity vs urgency

importunity and urgency both are nouns.

Word	Noun	Adjective	Verb	Adverb
importunity	Yes	No	No	No
urgency	Yes	No	No	No

As nouns, importunity and urgency are synonyms defined as:

Other synonyms of importunity include urging.

importunity (noun)	urgency (noun)
Quality of a person who is given to making importunate demands, being greedily or thoughtlessly demanding.	pressing importance requiring speedy action
insistent solicitation and entreaty	insistent solicitation and entreaty
	the state of being urgent; an earnest and insistent necessity
	an urgent situation calling for prompt action