10. The image processing method according to claim 9 , wherein in said step (e), when multiple synonyms corresponding to said single word is obtained in said step (c), more than one said accompanying layer is created and each of said multiple synonyms associated with said single word is embedded within a position on said different accompanying layer the same as the display position identified in said step (d).
9. An image processing method, comprising the steps of: (a) inputting image data; (b) extracting a word from texts contained in said image data; (c) obtaining a synonym corresponding to said word, and associating said obtained synonym with said word; (d) identifying a display position on said image data of said word with which said synonym is associated; (e) creating an accompanying layer to add to an original layer, which is said image data containing said word, and embedding said synonym associated with said word within a position on said accompanying layer that is the same as the display position of the word in said original layer identified in said step (d) so that the synonym in the accompanying layer overlaps the word in the original layer without replacing the word in the original layer, wherein the location of a first character of the synonym in the accompanying layer matches the location of a first character of the word in the original layer, or the display area of the synonym in the accompanying layer has the same size as the display area of the word in the original layer and is at the same location in the accompanying layer as the display area of the word in the original layer; and (f) generating output image data including said original layer containing said word and said accompanying layer within which said synonym is embedded and overlaps the word.