Blacktop and Rosin

Blacktop noun - A black bituminous material used for paving roads or other areas; usually spread over crushed rock.

Rosin and blacktop are semantically related. In some cases you can use "Rosin" instead a noun "Blacktop".

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.

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