give away vs giveaway

give away is not a noun while giveaway is a noun.

Word	Noun	Adjective	Verb	Adverb
give away	No	No	Yes	No
giveaway	Yes	No	No	No

give away (noun)	giveaway (noun)
	an unintentional disclosure
	a television or radio program in which contestants compete for awards
	a gift of public land or resources for the private gain of a limited group

give away (verb)	giveaway (verb)
make known to the public information that was previously known only to a few people or that was meant to be kept a secret
give away information about somebody
make a gift of
formally hand over to the bridegroom in marriage; of a bride by her father