Zb vs Eb

Zb and Eb both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zb	Yes	No	No	No
Eb	Yes	No	No	No

Zb (noun)	Eb (noun)
a unit of information equal to 1000 exabits or 10^21 bits	a unit of information equal to 1000 petabits or 10^18 bits