seafood vs soft roe

seafood and soft roe both are nouns.

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

As nouns, soft roe is a hyponym of seafood; that is, soft roe is a word with a more specific, narrower meaning than seafood:

seafood: edible fish (broadly including freshwater fish) or shellfish or roe etc
soft roe: fish sperm or sperm-filled reproductive gland; having a creamy texture

seafood (noun)	soft roe (noun)
edible fish (broadly including freshwater fish) or shellfish or roe etc	fish sperm or sperm-filled reproductive gland; having a creamy texture