night life vs entertainment

night life and entertainment both are nouns.

Word	Noun	Adjective	Verb	Adverb
night life	Yes	No	No	No
entertainment	Yes	No	No	No

As nouns, entertainment is a hypernym of night life; that is, entertainment is a word with a broader meaning than night life:

night life: the entertainment available to people seeking nighttime diversion
entertainment: an activity that is diverting and that holds the attention

Other hypernyms of night life include amusement.

night life (noun)	entertainment (noun)
the activity of people seeking nighttime diversion (as at the theater, a nightclub, etc.)	an activity that is diverting and that holds the attention
the entertainment available to people seeking nighttime diversion