discard vs throw out

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

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

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

discard (noun)	throw out (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

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