highfalutin vs la-di-da

highfalutin and la-di-da both are adjectives.

Word	Noun	Adjective	Verb	Adverb
highfalutin	No	Yes	No	No
la-di-da	No	Yes	No	No

As adjectives, highfalutin and la-di-da are synonyms defined as:

highfalutin and la-di-da: affectedly genteel; to carry an air of affected importance; to be snobbish and haughty

Other synonyms of highfalutin include grandiose, hifalutin, highfaluting, hoity-toity.

highfalutin (adjective)	la-di-da (adjective)
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