ramble vs go on

ramble is a noun but go on is not a noun.

Word	Noun	Adjective	Verb	Adverb
ramble	Yes	No	Yes	No
go on	No	No	Yes	No

As verbs, go on is a hypernym of ramble; that is, go on is a word with a broader meaning than ramble:

Other hypernyms of ramble include carry on, continue, proceed.

ramble (noun)	go on (noun)
an aimless amble on a winding course

ramble (verb)	go on (verb)
move about aimlessly or without any destination, often in search of food or employment	come to pass
continue talking or writing in a desultory manner	continue talking
	start running, functioning, or operating
	move forward, also in the metaphorical sense
	continue a certain state, condition, or activity