countermand vs bid

countermand and bid both are nouns.

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

As nouns, bid is a hypernym of countermand; that is, bid is a word with a broader meaning than countermand:

Other hypernyms of countermand include bidding, command, dictation.

countermand (noun)	bid (noun)
a contrary command cancelling or reversing a previous command	an attempt to get something
	a formal proposal to buy at a specified price
	(bridge) the number of tricks a bridge player is willing to contract to make
	an authoritative direction or instruction to do something

countermand (verb)	bid (verb)
cancel officially	ask someone in a friendly way to do something
	invoke upon
	ask for or request earnestly
	propose a payment
	make a demand, as for a card or a suit or a show of hands
	make a serious effort to attain something