This tenth century AD lexicon contains much more than just the words and their connotations. It includes colloquial phrases and their explanation, contains discussion of various subjects including invaluable information derived from earlier works. It has suffered interpolation and it contains inaccuracies, but it is still extremely useful. Lexeis of the ten orators. A compilation of words and phrases most of which are from the orators.
Most entries mention the author and even the work they come from.
Harpocration discusses briefly each word and quotes from many Greek authors. Etymology Chantraine, Pierre. Librairie C. Klincksieck, 1968. Halsey, Charles Storrs. An etymology of Latin and Greek .