fruit drink vs limeade

fruit drink and limeade both are nouns.

Word	Noun	Adjective	Verb	Adverb
fruit drink	Yes	No	No	No
limeade	Yes	No	No	No

As nouns, limeade is a hyponym of fruit drink; that is, limeade is a word with a more specific, narrower meaning than fruit drink:

Other hyponyms of fruit drink include lemonade, orangeade.

fruit drink (noun)	limeade (noun)
a sweetened beverage of diluted fruit juice	sweetened beverage of lime juice and water