rosin vs natural resin

rosin and natural resin both are nouns.

Word	Noun	Adjective	Verb	Adverb
rosin	Yes	No	Yes	No
natural resin	Yes	No	No	No

As nouns, natural resin is a hyponym of rosin; that is, natural resin is a word with a more specific, narrower meaning than rosin:

rosin: any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules
natural resin: a plant exudate

Other hyponyms of rosin include East India kino, kino gum, Malabar kino, synthetic resin.

rosin (noun)	natural resin (noun)
any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules	a plant exudate

rosin (verb)	natural resin (verb)
rub rosin onto