Ideographical is an uncommon word that refers to something that is related to ideograms. Ideograms are visual symbols used to represent ideas or concepts, primarily in written communication. Synonyms for ideographical include ideogrammatic, ideogrammic and ideographic. These words are often used interchangeably as they all refer to the use of symbols to convey meaning. While ideographical may not be a commonly used word, it is important to be aware of its meaning and synonyms as it can provide a more specific and accurate way to describe certain concepts related to visual communication.