An image processing device, comprises: an input part for inputting image data; a word extracting part for extracting a word from texts contained in the image data; a synonym obtaining part for obtaining a synonym corresponds to the word, and for associating the obtained synonym with the word; a position identifying part for identifying a display position on the image data of the word with which the synonym is associated; a layer creating part for creating an accompanying layer to add to an original layer, which is the image data containing the word, and for embedding the synonym associated with the word within a position on the accompanying layer the same as the display position identified by the position identifying part; and an output image generating part for generating output image data including the original layer containing the word and the accompanying layer within which the synonym is embedded.