entertain vs entertainment

entertain is not a noun while entertainment is a noun.

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

entertain (noun)	entertainment (noun)
	an activity that is diverting and that holds the attention

entertain (verb)	entertainment (verb)
take into consideration, have in view
maintain (a theory, thoughts, or feelings)
provide entertainment for