entertainment vs amusement

entertainment and amusement both are nouns.

Word	Noun	Adjective	Verb	Adverb
entertainment	Yes	No	No	No
amusement	Yes	No	No	No

As nouns, entertainment and amusement are synonyms defined as:

entertainment and amusement: an activity that is diverting and that holds the attention

entertainment (noun)	amusement (noun)
an activity that is diverting and that holds the attention	an activity that is diverting and that holds the attention
	a feeling of delight at being entertained