countermarch vs reorder

countermarch and reorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
countermarch	Yes	No	Yes	No
reorder	Yes	No	Yes	No

As verbs, reorder is a hypernym of countermarch; that is, reorder is a word with a broader meaning than countermarch:

countermarch (noun)	reorder (noun)
(military) a march in the reverse direction or back along the same route	a repeated order for the same merchandise

countermarch (verb)	reorder (verb)
change the order of soldiers during a march	assign a new order to
march back along the same way	make a new request to be supplied with