highfalutin vs grandiose

highfalutin and grandiose both are adjectives.

Word	Noun	Adjective	Verb	Adverb
highfalutin	No	Yes	No	No
grandiose	No	Yes	No	No

As adjectives, highfalutin and grandiose are synonyms defined as:

highfalutin and grandiose: affectedly genteel; to carry an air of affected importance; to be snobbish and haughty

Other synonyms of highfalutin include hifalutin, highfaluting, hoity-toity, la-di-da.

highfalutin (adjective)	grandiose (adjective)
affectedly genteel; to carry an air of affected importance; to be snobbish and haughty	impressive because of unnecessary largeness or grandeur; used to show disapproval
	affectedly genteel; to carry an air of affected importance; to be snobbish and haughty