lavishness vs highlife

lavishness and highlife both are nouns.

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

As nouns, lavishness and highlife are synonyms defined as:

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

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