urgency vs instancy

urgency and instancy both are nouns.

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

As nouns, instancy is a hyponym of urgency; that is, instancy is a word with a more specific, narrower meaning than urgency:

Other hyponyms of urgency include edge, sharpness, imperativeness.

urgency (noun)	instancy (noun)
pressing importance requiring speedy action	the quality of being insistent
insistent solicitation and entreaty	the quickness of action or occurrence
the state of being urgent; an earnest and insistent necessity
an urgent situation calling for prompt action