liver vs calves' liver

liver and calves' liver both are nouns.

Word	Noun	Adjective	Verb	Adverb
liver	Yes	Yes	No	No
calves' liver	Yes	No	No	No

As nouns, calves' liver is a hyponym of liver; that is, calves' liver is a word with a more specific, narrower meaning than liver:

Other hyponyms of liver include calf's liver, chicken liver, goose liver, tomalley.

liver (noun)	calves' liver (noun)
large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity; secretes bile and functions in metabolism of protein and carbohydrate and fat; synthesizes substances involved in the clotting of the blood; synthesizes vitamin A; detoxifies poisonous substances and breaks down worn-out erythrocytes	liver of a calf used as meat
liver of an animal used as meat
someone who lives in a place
a person who has a special life style

liver (adjective)	calves' liver (adjective)
having a reddish-brown color