jillion vs gazillion

jillion and gazillion both are nouns.

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

As nouns, jillion and gazillion are synonyms defined as:

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

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

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