If they have red stars including giants in, they can't be all that featureless.
With red giants and main sequence stars they are not entirely featureless, therefore there is no name for them.
They are simply called "galaxies which are part of a cluster".
Elliptical galaxies are sometime called dwarf galaxies.
They are called elliptical galaxies.
irregular galaxies
A group of galaxies is called a cluster.
They are elliptical galaxies.
You can have dwarf elliptical galaxies.
They are called Spiral Galaxies or Barred Galaxies.
The local group of galaxies that include our Milky Way is called the "Local Group".The local group of galaxies that include our Milky Way is called the "Local Group".The local group of galaxies that include our Milky Way is called the "Local Group".The local group of galaxies that include our Milky Way is called the "Local Group".
That's called a supercluster.
Astronomy