The Collaborative International Dictionary of English v.0.48:

Phraseology \Phra`se*ol"o*gy\, n. [Gr. ?, ?, phrase + -logy: cf.
   F. phras['e]ologie.]
   1. Manner of expression; peculiarity of diction; style.
      [1913 Webster]

            Most completely national in his . . . phraseology.
                                                  --I. Taylor.
      [1913 Webster]

   2. A collection of phrases; a phrase book. [R.]
      [1913 Webster]

   Syn: Diction; style. See Diction.
        [1913 Webster]

WordNet (r) 3.0 (2006):

phraseology
    n 1: the manner in which something is expressed in words; "use
         concise military verbiage"- G.S.Patton [syn: wording,
         diction, phrasing, phraseology, choice of words,
         verbiage]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "phraseology":
   argot, cant, choice of words, composition, dialect, diction,
   expression, formulation, gibberish, gobbledygook, grammar, idiom,
   jargon, language, langue, lexicon, lexis, lingo, lingua, locution,
   mumbo jumbo, parlance, parole, patois, patter, personal usage,
   phrase, phrasing, rhetoric, scatology, slang, speech,
   stock of words, taboo language, talk, thesaurus, tongue, usage,
   use of words, usus loquendi, verbalism, verbiage, vernacular,
   vocabulary, vulgar language, wordage, wordhoard, wording, words