eel vs smoked eel

eel and smoked eel both are nouns.

Word	Noun	Adjective	Verb	Adverb
eel	Yes	No	No	No
smoked eel	Yes	No	No	No

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

eel: the fatty flesh of eel; an elongate fish found in fresh water in Europe and America; large eels are usually smoked or pickled
smoked eel: eel cured by smoking

Other hyponyms of eel include elver.

eel (noun)	smoked eel (noun)
voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins	eel cured by smoking
the fatty flesh of eel; an elongate fish found in fresh water in Europe and America; large eels are usually smoked or pickled