zombie spirit vs zombi spirit

zombie spirit and zombi spirit both are nouns.

As nouns, zombie spirit and zombi spirit are synonyms defined as:

zombie spirit and zombi spirit: (voodooism) a spirit or supernatural force that reanimates a dead body

Other synonyms of zombie spirit include zombi, zombie.

zombie spirit (noun)	zombi spirit (noun)
(voodooism) a spirit or supernatural force that reanimates a dead body	(voodooism) a spirit or supernatural force that reanimates a dead body