give it the deep six vs discard

give it the deep six is not a noun while discard is a noun.

Word	Noun	Adjective	Verb	Adverb
give it the deep six	No	No	Yes	No
discard	Yes	No	Yes	No

As verbs, discard is a hypernym of give it the deep six; that is, discard is a word with a broader meaning than give it the deep six:

Other hypernyms of give it the deep six include cast aside, cast away, cast out, chuck out, dispose, fling, put away, throw away, throw out, toss, toss away, toss out.

give it the deep six (noun)	discard (noun)
	getting rid of something that is regarded as useless or undesirable
	(cards) the act of throwing out a useless card or of failing to follow suit
	anything that is cast aside or discarded

give it the deep six (verb)	discard (verb)
toss out; get rid of	throw or cast away