There are two very long, very similar, and very rare words, Jesus uses here, perhaps even making them up. He often does this for the sake of humor.  The common form of these words is used in Luke 22:25. The two keywords here only appear in Greek writing after the time of the Gospels so Jesus may gave coined them or "koined" them, making them more common.

The Greek of these two words looks amusing, κατακυριεύουσιν and κατεξουσιάζουσιν. Notice that both have the same initial prefix, meaning "down" or "under." They also both have the same ending, but that is because they are the same verb form. Both these words are also found in Mark 10:42, but both are made into more common words, their prefixes removed, in Luke 22:25. So Luke may be the first one to start simplifying Jesus's words, making them more serious and easier to understand. Something that continues today in English translation. The root of the first word is the common word for "lord." With the prefix, the sense is "lording over," which has its own humorous uses in English. The root of the second is a less common word, used by Jesus twenty-three times, meaning "power," specifically legal authority, and again, we have a similar verb in English "to overpower."