They could go back to the ancient meaning of planet as a bright object that wanders in the sky (compared to the "fixed" stars). Of course the ancients had 7 planets but we would have to leave out the sun and the moon, so there would be 5 (Mercury, Venus, Mars, Jupiter, Saturn). "Bright objects which reflect light from the sun and move in a regular fashion compared to the stars." Maybe there would be a way to work the earth into the definition.
The rest--Uranus, Neptune, Pluto, the asteroids, the Kuiper Belt objects, the comets, could be "solar satellites." Smaller objects orbiting a planet or a solar satellite could be called a "planetary parasite" or a "solar satellite parasite."
>>The rest—Uranus, Neptune, Pluto, the asteroids, the Kuiper Belt objects, the comets, could be “solar satellites.” Smaller objects orbiting a planet or a solar satellite could be called a “planetary parasite” or a “solar satellite parasite.”<<
Yes, it does look like we need a new planet taxonomy. But we have to do it so the lesser planets don’t shriek for their safe spaces.