[2] One can distinguish the literary joining of terms derived from the vocabularies of sensory domains from synaesthesia as a neuropsychological phenomenon.
In this respect, the sequence of senses from low to high is generally taken to be touch, taste, smell, sound, then sight.
[4] This observation was named a panchronistic tendency by Stephen Ullmann since he saw the lowest levels of sense having the poorest vocabulary.
[2] Examples include: When a linkage of two senses depends upon a pun, this is known as synaesthetic polysemy.
[2] Examples include: "the hyacinth purple, and white, and blue, Which flung from its bells a sweet peal anew Of music"