promptness vs quickness

promptness and quickness both are nouns.

Word	Noun	Adjective	Verb	Adverb
promptness	Yes	No	No	No
quickness	Yes	No	No	No

As nouns, quickness is a hypernym of promptness; that is, quickness is a word with a broader meaning than promptness:

Other hypernyms of promptness include celerity, rapidity, rapidness, speediness.

promptness (noun)	quickness (noun)
the characteristic of doing things without delay	a rate that is rapid
the quality or habit of adhering to an appointed time	intelligence as revealed by an ability to give correct responses without delay
	skillful performance or ability without difficulty