instancy vs speediness

instancy and speediness both are nouns.

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

As nouns, speediness is a hypernym of instancy; that is, speediness is a word with a broader meaning than instancy:

Other hypernyms of instancy include celerity, quickness, rapidity, rapidness.

instancy (noun)	speediness (noun)
the quality of being insistent	a rate that is rapid
the quickness of action or occurrence