Illustrational is an adjective that describes something that is related to illustration or serves as an illustration. There are several synonyms for the word illustrational, which include pictorial, graphic, visual, representational, demonstrative, and iconic. Pictorial suggests a detailed and realistic representation, while visual indicates that something can be seen or perceived by the eye. Graphic means that something is portrayed in a graphical or vivid way, while representational implies that something is presented in a way that depicts what it represents. Demonstrative indicates something that is used to explain or demonstrate, while iconic means that something is representative or symbolic. These synonyms can be used interchangeably in certain contexts to enhance the meaning of the sentence.