juice vs lime juice

juice and lime juice both are nouns.

Word	Noun	Adjective	Verb	Adverb
juice	Yes	No	No	No
lime juice	Yes	No	No	No

As nouns, lime juice is a hyponym of juice; that is, lime juice is a word with a more specific, narrower meaning than juice:

juice: the liquid part that can be extracted from plant or animal tissue by squeezing or cooking
lime juice: usually freshly squeezed juice of limes

Other hyponyms of juice include gravy, pan gravy, lemon juice, papaya juice, tomato juice, carrot juice, V-8 juice.

juice (noun)	lime juice (noun)
any of several liquids of the body	usually freshly squeezed juice of limes
the liquid part that can be extracted from plant or animal tissue by squeezing or cooking
electric current
energetic vitality