squid vs seafood

squid and seafood both are nouns.

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

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

squid: (Italian cuisine) squid prepared as food
seafood: edible fish (broadly including freshwater fish) or shellfish or roe etc

squid (noun)	seafood (noun)
widely distributed fast-moving ten-armed cephalopod mollusk having a long tapered body with triangular tail fins	edible fish (broadly including freshwater fish) or shellfish or roe etc
(Italian cuisine) squid prepared as food