I was wondering if there was a name for the words that define classes by labeling individuals within socio-economic structures, such as "serfs" or "masters" in a line like:

"Masters in the colonised world will seek to realise their brilliance through the organization of their serf(s)."

I hesitate to call words of this nature "stereotypes" as they are descriptive of real social phenomenon, I guess I am seeking a grammatical mechanism to distinguish between a specific few individuals of a particular social rank and the entire body of that class.

I hesitate to call these words "labels" as the do not define who or what people are but rather how they relate to others given these casts from a structure, a structure constructed of varying components of this type.

Thanks in advance for your thoughts.