gazillion vs jillion

gazillion and jillion both are nouns.

Word	Noun	Adjective	Verb	Adverb
gazillion	Yes	No	No	No
jillion	Yes	No	No	No

As nouns, gazillion and jillion are synonyms defined as:

gazillion and jillion: a very large indefinite number (usually hyperbole)

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

gazillion (noun)	jillion (noun)
a very large indefinite number (usually hyperbole)	a very large indefinite number (usually hyperbole)