purpose vs propose

purpose is a noun but propose is not a noun.

Word	Noun	Adjective	Verb	Adverb
purpose	Yes	No	Yes	No
propose	No	No	Yes	No

As verbs, purpose and propose are synonyms defined as:

Other synonyms of purpose include aim, purport.

purpose (noun)	propose (noun)
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

purpose (verb)	propose (verb)
reach a decision	present for consideration, examination, criticism, etc.
propose or intend	propose or intend
	make a proposal, declare a plan for something
	ask (someone) to marry you
	put forward; nominate for appointment to an office or for an honor or position