mastic vs natural resin

mastic and natural resin both are nouns.

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

As nouns, natural resin is a hypernym of mastic; that is, natural resin is a word with a broader meaning than mastic:

mastic (noun)	natural resin (noun)
an evergreen shrub of the Mediterranean region that is cultivated for its resin	a plant exudate
an aromatic exudate from the mastic tree; used chiefly in varnishes
a pasty cement used as an adhesive or filler