Z vs zed

Z and zed both are nouns.

Word	Noun	Adjective	Verb	Adverb
Z	Yes	No	No	No
zed	Yes	No	No	No

As nouns, Z and zed are synonyms defined as:

Other synonyms of Z include ezed, izzard, z, zee.

Z (noun)	zed (noun)
the 26th letter of the Roman alphabet	the 26th letter of the Roman alphabet
the ending of a series or sequence