grandiosity vs fustian

grandiosity and fustian both are nouns.

Word	Noun	Adjective	Verb	Adverb
grandiosity	Yes	No	No	No
fustian	Yes	No	No	No

As nouns, fustian is a hyponym of grandiosity; that is, fustian is a word with a more specific, narrower meaning than grandiosity:

Other hyponyms of grandiosity include flourish, blah, bombast, claptrap, rant.

grandiosity (noun)	fustian (noun)
high-flown style; excessive use of verbal ornamentation	a strong cotton and linen fabric with a slight nap
	pompous or pretentious talk or writing