purport vs propose

purport is a noun but propose is not a noun.

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

As verbs, purport and propose are synonyms defined as:

Other synonyms of purport include aim, purpose.

purport (noun)	propose (noun)
the pervading meaning or tenor
the intended meaning of a communication

purport (verb)	propose (verb)
propose or intend	present for consideration, examination, criticism, etc.
have the often specious appearance of being, intending, or claiming	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