think about vs entertain

think about and entertain both are verbs.

Word	Noun	Adjective	Verb	Adverb
think about	No	No	Yes	No
entertain	No	No	Yes	No

As verbs, think about and entertain are synonyms defined as:

Other synonyms of think about include flirt with, think of, toy with.

think about (verb)	entertain (verb)
take into consideration, have in view	take into consideration, have in view
have on one's mind, think about actively	maintain (a theory, thoughts, or feelings)
	provide entertainment for