phraseology vs choice of words

phraseology and choice of words both are nouns.

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

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

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

Other synonyms of phraseology include diction, phrasing, verbiage, wording.

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