conciseness vs pithiness

conciseness and pithiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
conciseness	Yes	No	No	No
pithiness	Yes	No	No	No

As nouns, conciseness and pithiness are synonyms defined as:

conciseness and pithiness: terseness and economy in writing and speaking achieved by expressing a great deal in just a few words

Other synonyms of conciseness include concision, succinctness.

conciseness (noun)	pithiness (noun)
terseness and economy in writing and speaking achieved by expressing a great deal in just a few words	terseness and economy in writing and speaking achieved by expressing a great deal in just a few words