countermand vs rescind

countermand is a noun but rescind is not a noun.

Word	Noun	Adjective	Verb	Adverb
countermand	Yes	No	Yes	No
rescind	No	No	Yes	No

As verbs, countermand and rescind are synonyms defined as:

Other synonyms of countermand include annul, lift, overturn, repeal, reverse, revoke, vacate.

countermand (noun)	rescind (noun)
a contrary command cancelling or reversing a previous command

countermand (verb)	rescind (verb)
cancel officially	cancel officially