Crabb's "English Synonymes Explained." [H.]
Soule's "Dictionary of English Synonyms." [L.]
Smith's "Synonyms Discriminated." [Bell.]
Graham's "English Synonyms." [A.]
Whateley's "English Synonyms Discriminated." [L. & S.]
Campbell's "Handbook of Synonyms." [L. & S.]
Fallows' "Complete Dictionary of Synonyms and Antonyms." [F. H. R.]
Roget's "Thesaurus of English Words." [F. & W. Co.]
Trench's "Study of English Words." [W. J. W.]
Richard Grant White, "Words and their Uses," and "Every Day English." [H. M. & Co.]