Undread vs Undead - What's the difference?

As nouns the difference between undread and undead

is that undread is lack or want of dread; dreadlessness while undead is those creatures which are dead yet still moving.

pertaining to a corpse, though having qualities of life.

(-)

Lack or want of dread; dreadlessness.

*2012 , Stephen Hunter, Soft Target :

It was somehow the opposite of mass dread; it was mass undread .

(-)

Pertaining to a corpse, though having qualities of life.

(horror fiction) Being animate, though non-living.

(wikipedia undead) (en-noun)

Those creatures which are dead yet still moving.

In the zombie movie, an army of the undead accosted some nubile skinny-dipping teenagers.

* 1997 , Carol Margaret Davison, Paul Simpson-Housley, Bram Stoker's Dracula: sucking through the century, 1897-1997

Innocent VIII lent credibility to the actual existence of undeads , an action that perpetuated, and even stimulated, vampire hysteria.