dispatch vs rapidity

dispatch and rapidity both are nouns.

Word	Noun	Adjective	Verb	Adverb
dispatch	Yes	No	Yes	No
rapidity	Yes	No	No	No

As nouns, rapidity is a hypernym of dispatch; that is, rapidity is a word with a broader meaning than dispatch:

Other hypernyms of dispatch include celerity, quickness, rapidness, speediness.

dispatch (noun)	rapidity (noun)
the act of sending off something	a rate that is rapid
killing a person or animal
the property of being prompt and efficient
an official report (usually sent in haste)

dispatch (verb)	rapidity (verb)
kill without delay
send away towards a designated goal
complete or carry out
kill intentionally and with premeditation
dispose of rapidly and without delay and efficiently