Kauri gum and Rosin

Kauri gum noun - Resin of the kauri trees of New Zealand; found usually as a fossil; also collected for making varnishes and linoleum.

Rosin and kauri gum are semantically related. In some cases you can use "Rosin" instead a noun phrase "Kauri gum".

Rosin 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.

Kauri gum and rosin are semantically related. You can use "Kauri gum" instead a noun "Rosin".