perambulation vs ramble

perambulation and ramble both are nouns.

Word	Noun	Adjective	Verb	Adverb
perambulation	Yes	No	No	No
ramble	Yes	No	Yes	No

As nouns, ramble is a hyponym of perambulation; that is, ramble is a word with a more specific, narrower meaning than perambulation:

Other hyponyms of perambulation include meander, walkabout.

perambulation (noun)	ramble (noun)
a leisurely walk (usually in some public place)	an aimless amble on a winding course
a walk around a territory (a parish or manor or forest etc.) in order to officially assert and record its boundaries

perambulation (verb)	ramble (verb)
	move about aimlessly or without any destination, often in search of food or employment
	continue talking or writing in a desultory manner