grandiloquent vs overblown

grandiloquent and overblown both are adjectives.

Word	Noun	Adjective	Verb	Adverb
grandiloquent	No	Yes	No	No
overblown	No	Yes	No	No

As adjectives, grandiloquent and overblown are synonyms defined as:

Other synonyms of grandiloquent include pompous, pontifical, portentous.

grandiloquent (adjective)	overblown (adjective)
puffed up with vanity	past the stage of full bloom
lofty in style	puffed up with vanity