glycogen vs animal starch

glycogen and animal starch both are nouns.

Word	Noun	Adjective	Verb	Adverb
glycogen	Yes	No	No	No
animal starch	Yes	No	No	No

As nouns, glycogen and animal starch are synonyms defined as:

glycogen and animal starch: one form in which body fuel is stored; stored primarily in the liver and broken down into glucose when needed by the body

glycogen (noun)	animal starch (noun)
one form in which body fuel is stored; stored primarily in the liver and broken down into glucose when needed by the body	one form in which body fuel is stored; stored primarily in the liver and broken down into glucose when needed by the body