final cause vs purpose

final cause and purpose both are nouns.

Word	Noun	Adjective	Verb	Adverb
final cause	Yes	No	No	No
purpose	Yes	No	Yes	No

As nouns, purpose is a hypernym of final cause; that is, purpose is a word with a broader meaning than final cause:

final cause: (philosophy) the end or purpose of a thing or process
purpose: an anticipated outcome that is intended or that guides your planned actions

Other hypernyms of final cause include aim, design, intent, intention.

final cause (noun)	purpose (noun)
(philosophy) the end or purpose of a thing or process	what something is used for
	the quality of being determined to do or achieve something; firmness of purpose
	an anticipated outcome that is intended or that guides your planned actions

final cause (verb)	purpose (verb)
	reach a decision
	propose or intend