roe vs seafood

roe and seafood both are nouns.

Word	Noun	Adjective	Verb	Adverb
roe	Yes	No	No	No
seafood	Yes	No	No	No

As nouns, seafood is a hypernym of roe; that is, seafood is a word with a broader meaning than roe:

roe: fish eggs or egg-filled ovary; having a grainy texture
seafood: edible fish (broadly including freshwater fish) or shellfish or roe etc

roe (noun)	seafood (noun)
eggs of female fish	edible fish (broadly including freshwater fish) or shellfish or roe etc
the eggs or egg-laden ovary of a fish
the egg mass or spawn of certain crustaceans such as the lobster
fish eggs or egg-filled ovary; having a grainy texture