highlife vs lavishness

highlife and lavishness both are nouns.

Word	Noun	Adjective	Verb	Adverb
highlife	Yes	No	No	No
lavishness	Yes	No	No	No

As nouns, highlife and lavishness are synonyms defined as:

Other synonyms of highlife include extravagance, high life, prodigality.

highlife (noun)	lavishness (noun)
the activity of excessive spending	the activity of excessive spending
	the quality possessed by something that is excessively expensive