request vs propose

request is a noun but propose is not a noun.

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

As verbs, propose is a hyponym of request; that is, propose is a word with a more specific, narrower meaning than request:

Other hyponyms of request include enjoin, order, say, tell, call, bid, invite, declare oneself, offer, pop the question.

request (noun)	propose (noun)
the verbal act of requesting
a formal message requesting something that is submitted to an authority

request (verb)	propose (verb)
express the need or desire for	present for consideration, examination, criticism, etc.
ask (a person) to do something	propose or intend
inquire for (information)	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