grandiose vs highfalutin

grandiose and highfalutin both are adjectives.

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

As adjectives, grandiose and highfalutin are synonyms defined as:

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

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

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