immediacy vs quickness

immediacy and quickness both are nouns.

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

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

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

immediacy (noun)	quickness (noun)
the quickness of action or occurrence	a rate that is rapid
lack of an intervening or mediating agency	intelligence as revealed by an ability to give correct responses without delay
immediate intuitive awareness	skillful performance or ability without difficulty