Answer:
There are too many, but i'll make it shorter.
syn could be any other sense or senses.
sight(shape,color, person, movement) >syn
sight (graph, grapheme, word) >syn
sound>syn
smell>syn
taste>syn
touch>syn
emotion>syn
concept>syn
And there could be a chain of syns. such as:
Smell>Taste>Touch>sight
(I never heard a chain of more than 3, but yeah, it's just an example)