choice of words vs phraseology

choice of words and phraseology both are nouns.

Word	Noun	Adjective	Verb	Adverb
choice of words	Yes	No	No	No
phraseology	Yes	No	No	No

As nouns, choice of words and phraseology are synonyms defined as:

choice of words and phraseology: the manner in which something is expressed in words

Other synonyms of choice of words include diction, phrasing, verbiage, wording.

choice of words (noun)	phraseology (noun)
the manner in which something is expressed in words	the manner in which something is expressed in words