throw out vs discard

throw out is not a noun while discard is a noun.

Word	Noun	Adjective	Verb	Adverb
throw out	No	No	Yes	No
discard	Yes	No	Yes	No

As verbs, throw out and discard are synonyms defined as:

throw out (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

throw out (verb)	discard (verb)
bring forward for consideration or acceptance	throw or cast away
cease to consider; put out of judicial consideration
throw or cast away
remove from a position or office
force to leave or move out