I cheated in a couple of places with spelling, but these were still fun to write.

Enclosure

ENCLOSURE

Nothing gets out, nothing gets iN

Confined within space specifiC

Locked up body and souL

Open up!  The answer’s nO

Stripped of freedom’s blisS

Unable to break thrU

Release me!  The answer’s neveR

ENCLOSURE

Alphabetic Explanation of the Undead

A Beetle Clawing Dirt Entered Forgotten Graves. He, Incidentally, Just Krept Last Month Near Other Places Quite Radioactively Saturated. This Unusual Visitor Would X-plain Your Zombies.