ginormous

As adjectives the difference between ginormous and undefined

is that ginormous is (informal) very large while undefined is lacking a definition or value.

As a noun big

is a biological insulation garment; an air-tight, full-body suit intended to prevent the spread of contaminants.

As an adjective ginormous is

(informal) very large.

As adjectives the difference between colossal and ginormous

is that colossal is extremely large or on a great scale while ginormous is very large.

As adjectives the difference between ginormous and epic

is that ginormous is (informal) very large while epic is of, or relating to, an epic.

As a noun epic is

an extended narrative poem in elevated or dignified language, celebrating the feats of a deity or demigod (heroic epic) or other legendary or traditional hero.

As adjectives the difference between huge and ginormous

is that huge is very large while ginormous is (informal) very large.

As adjectives the difference between ginormous and jumbo

is that ginormous is (informal) very large while jumbo is especially large or powerful.

As a noun jumbo is

an especially large or powerful person, animal or thing.

As adjectives the difference between tremendous and ginormous

is that tremendous is awe-inspiring; terrific while ginormous is (informal) very large.

In informal terms the difference between ginormous and humongous

is that ginormous is very large while humongous is of an extremely large size.

Humungus is likely misspelled.

Humungus has no English definition.

As an adjective ginormous

is very large.