pontifical vs grandiloquent

pontifical is a noun but grandiloquent is not a noun.

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

As adjectives, pontifical and grandiloquent are synonyms defined as:

Other synonyms of pontifical include overblown, pompous, portentous.

pontifical (noun)	grandiloquent (noun)
the vestments and other insignia of a pontiff (especially a bishop)

pontifical (adjective)	grandiloquent (adjective)
denoting or governed by or relating to a bishop or bishops	puffed up with vanity
proceeding from or ordered by or subject to a pope or the papacy regarded as the successor of the Apostles	lofty in style
puffed up with vanity