AneryA: Black/brown/dark gray pattern with a lighter gray ground color. Lacks the ability to produce red or orange pigment. Pupil is black, iris is light gray. They usually develop a lot of yellow, especially on the sides of their necks.
AneryB (a.k.a. "Charcoal"): Black/dark gray pattern with gray ground color, but with less contrast between pattern and ground than the typical AneryA. Lacks the ability to produce red or orange pigment. Pupil is black, iris is dark gray, and is usually hardly discernible from the pupil in normal light. They usually don't develop much or any yellow, but there are exceptions.
AneryC (a.k.a. "Cinder", "Z-Morph"): Hard to describe, and there aren't that many in existence. Hatchlings have reddish brown pattern with silvery-gray ground color. Reddish brown pattern may fade to gray as the snake matures. Pupils are black, iris is bronzish-gold. You really need to see some photos to get a feel for the look. Do a search for "cinder".
The main pattern types are normal, motley, stripe, and diffused. You can search for these key words to get an idea of the different looks.
Ghosts are corns that are both AneryA and Hypomelanistic (a mutant gene that reduces blacks and browns). As with most corn morphs, there is huge variation in appearance from snake to snake. Corns that are AneryB and Hypo are usually called "Phantoms", but they are sometimes referred to as "Charcoal Ghosts".