Nothing really "matches" zilla, but that's the beauty of it. It's a blank canvas waiting to be painted. A few well known companies have done that (Mozilla, Prozilla, etc.) with branding.
Typically, the best words/terms to stick in front of the 'zilla' are short words, single syllables, and 'Earth' fits that nicely.
Dancezilla.com - I sold this at SEDO for a couple hundred bucks. It was a $7 reg.