quickness vs despatch

quickness and despatch both are nouns.

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

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

quickness (noun)	despatch (noun)
a rate that is rapid	the act of sending off something
intelligence as revealed by an ability to give correct responses without delay	killing a person or animal
skillful performance or ability without difficulty	the property of being prompt and efficient
	an official report (usually sent in haste)

quickness (verb)	despatch (verb)
	send away towards a designated goal