fruit drink vs lemonade

fruit drink and lemonade both are nouns.

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

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

Other hyponyms of fruit drink include limeade, orangeade.

fruit drink (noun)	lemonade (noun)
a sweetened beverage of diluted fruit juice	sweetened beverage of diluted lemon juice