giveaway vs game show

giveaway and game show both are nouns.

Word	Noun	Adjective	Verb	Adverb
giveaway	Yes	No	No	No
game show	Yes	No	No	No

As nouns, giveaway and game show are synonyms defined as:

giveaway and game show: a television or radio program in which contestants compete for awards

giveaway (noun)	game show (noun)
an unintentional disclosure	a television or radio program in which contestants compete for awards
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