pop the question vs propose

pop the question and propose both are verbs.

Word	Noun	Adjective	Verb	Adverb
pop the question	No	No	Yes	No
propose	No	No	Yes	No

As verbs, pop the question and propose are synonyms defined as:

Other synonyms of pop the question include declare oneself, offer.

pop the question (verb)	propose (verb)
ask (someone) to marry you	present for consideration, examination, criticism, etc.
	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