expeditiousness vs despatch

expeditiousness and despatch both are nouns.

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

As nouns, expeditiousness and despatch are synonyms defined as:

expeditiousness and despatch: the property of being prompt and efficient

Other synonyms of expeditiousness include dispatch, expedition.

expeditiousness (noun)	despatch (noun)
the property of being prompt and efficient	the act of sending off something
	killing a person or animal
	the property of being prompt and efficient
	an official report (usually sent in haste)

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