expeditiousness vs quickness

expeditiousness and quickness both are nouns.

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

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

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

expeditiousness (noun)	quickness (noun)
the property of being prompt and efficient	a rate that is rapid
	intelligence as revealed by an ability to give correct responses without delay
	skillful performance or ability without difficulty