lion marmoset vs marmoset

lion marmoset and marmoset both are nouns.

Word	Noun	Adjective	Verb	Adverb
lion marmoset	Yes	No	No	No
marmoset	Yes	No	No	No

As nouns, marmoset is a hypernym of lion marmoset; that is, marmoset is a word with a broader meaning than lion marmoset:

lion marmoset: small South American marmoset with silky fur and long nonprehensile tail
marmoset: small soft-furred South American and Central American monkey with claws instead of nails

lion marmoset (noun)	marmoset (noun)
small South American marmoset with silky fur and long nonprehensile tail	small soft-furred South American and Central American monkey with claws instead of nails