walkabout vs perambulation

walkabout and perambulation both are nouns.

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

As nouns, perambulation is a hypernym of walkabout; that is, perambulation is a word with a broader meaning than walkabout:

Other hypernyms of walkabout include amble, promenade, saunter, stroll.

walkabout (noun)	perambulation (noun)
nomadic excursions into the bush made by an Aborigine	a leisurely walk (usually in some public place)
a public stroll by a celebrity to meet people informally	a walk around a territory (a parish or manor or forest etc.) in order to officially assert and record its boundaries
a walking trip or tour