verbosity vs expressive style

verbosity and expressive style both are nouns.

Word	Noun	Adjective	Verb	Adverb
verbosity	Yes	No	No	No
expressive style	Yes	No	No	No

As nouns, expressive style is a hypernym of verbosity; that is, expressive style is a word with a broader meaning than verbosity:

verbosity: an expressive style that uses excessive or empty words
expressive style: a way of expressing something (in language or art or music etc.) that is characteristic of a particular person or group of people or period

Other hypernyms of verbosity include style.

verbosity (noun)	expressive style (noun)
an expressive style that uses excessive or empty words	a way of expressing something (in language or art or music etc.) that is characteristic of a particular person or group of people or period