Exodus 12:45 - "No sojourner or hired servant may eat of it."
2 Kings 4:43 - "But his servant said, ‘How am I to set this before a hundred men?’ ..."
A servant is a person of either sex who is in the service of another person, and the term does not necessarily mean that this servant is a domestic, in the sense that we use it today. In our usage, a servant is one who works for pay and in so doing attends to the physical needs, in one way or another, of the person who has employed him.
But this was not necessarily the designation in the ancient world. Rather, that concept would be more akin to "slave," which implies a forced labor, but is more in keeping with the type of work done by today’s servants. Rather, the ancient servant means merely someone who was in service to another, and this type of service was often of a high order. In that sense, then, any person under the king was a servant. For example, we have Eliezer, whose position in the household of Abraham compared with that of the prime niinister, hardly a menial position!
However, the servant had certain obligations, whatever his status or rank - he was under obligation to obey and to work for the benefit of his master, which is still not too far away from the idea of the hired workman of today. In return for his obedience and care, he received protection and reciprocal care.
The servitor, on the other hand, may correspond more to our modern concept of servant, since he was the one who served, or ministered to, another. However, again, we must not necessarily equate this with a menial position, although, of course, it could well have been one, and often was. But the point is that it did not have to be so. It may merely mean "one in waiting," or the person who is available to serve in whatever capacity is required. And that, too, is still true today.