give away vs stag

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

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

As verbs, give away and stag are synonyms defined as:

Other synonyms of give away include betray, denounce, grass, rat, shit, shop, snitch, tell on.

give away (noun)	stag (noun)
	adult male deer
	a male deer, especially an adult male red deer

give away (verb)	stag (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	watch, observe, or inquire secretly
give away information about somebody	give away information about somebody
make a gift of	attend a dance or a party without a female companion
formally hand over to the bridegroom in marriage; of a bride by her father