Hydrocarbon and Naphtha

Hydrocarbon noun - An organic compound containing only carbon and hydrogen.

Naphtha and hydrocarbon are semantically related. In some cases you can replace term "Naphtha" with "Hydrocarbon", this nouns are similar.

Naphtha noun - Any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents.

Hydrocarbon and naphtha are semantically related. Sometimes you can use "Hydrocarbon" instead a noun "Naphtha".