zillion vs bazillion

zillion and bazillion both are nouns.

Word	Noun	Adjective	Verb	Adverb
zillion	Yes	Yes	No	No
bazillion	Yes	No	No	No

As nouns, zillion and bazillion are synonyms defined as:

zillion and bazillion: a very large indefinite number (usually hyperbole)

Other synonyms of zillion include billion, gazillion, jillion, million, trillion.

zillion (noun)	bazillion (noun)
a very large indefinite number (usually hyperbole)	a very large indefinite number (usually hyperbole)

zillion (adjective)	bazillion (adjective)
very large indeterminate number