> As in, to describe actual human slavery?
Sorry, but I do not understand the question. Do you mean as to distinguish slavery relationship in logical systems (as with databases) versus human relations? If so, that wasn’t my intention.
What I was talking about was more about a euphemism replacing an actual word, as with taboo avoidance:
> This terminology for the animal originated as a taboo avoidance term: proto-Germanic tribes replaced their original word for bear — arkto — with this euphemistic expression out of fear that speaking the animal's true name might cause it to appear. According to author Ralph Keyes, this is the oldest known euphemism. [0]