vast vs Brobdingnagian

vast and Brobdingnagian both are adjectives.

Word	Noun	Adjective	Verb	Adverb
vast	No	Yes	No	No
Brobdingnagian	No	Yes	No	No

As adjectives, vast and Brobdingnagian are synonyms defined as:

vast and Brobdingnagian: unusually great in size or amount or degree or especially extent or scope

Other synonyms of vast include huge, immense.

vast (adjective)	Brobdingnagian (adjective)
unusually great in size or amount or degree or especially extent or scope	huge; relating to or characteristic of the imaginary country of Brobdingnag
	unusually great in size or amount or degree or especially extent or scope