There are things or physical objects. They can be seen, heard, smelled, tasted and touched. That is, these things can be known by the five senses. …Objects and communicable meaning
All that is necessary to know is that the concept (representation) and word form (signifier) are distinct the very object that motivates them. And by extension the concept and word form are also distinct from each other.
For lack of a better word or better way to express it (this is the limit of language) word form, concept and object are separate “things”.
In the previous post, I have stated what physical objects are. Suffice to say, concepts and word forms are not physical objects. Neither concept nor word form have physical properties. Concept and word form are properties of physical objects.