highlife vs high life

highlife and high life both are nouns.

Word	Noun	Adjective	Verb	Adverb
highlife	Yes	No	No	No
high life	Yes	No	No	No

As nouns, highlife and high life are synonyms defined as:

Other synonyms of highlife include extravagance, lavishness, prodigality.

highlife (noun)	high life (noun)
the activity of excessive spending	the activity of excessive spending