cookout vs wiener roast

cookout and wiener roast both are nouns.

Word	Noun	Adjective	Verb	Adverb
cookout	Yes	No	No	No
wiener roast	Yes	No	No	No

As nouns, wiener roast is a hyponym of cookout; that is, wiener roast is a word with a more specific, narrower meaning than cookout:

Other hyponyms of cookout include barbecue, barbeque, clambake, fish fry, weenie roast, burgoo.

cookout (noun)	wiener roast (noun)
an informal meal cooked and eaten outdoors	a cookout where roasted frankfurters are the main course