Aromatic hydrocarbon and Hydrocarbon

Aromatic hydrocarbon noun - A hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds.

Hydrocarbon and aromatic hydrocarbon are semantically related. In some cases you can use "Hydrocarbon" instead a noun phrase "Aromatic hydrocarbon".

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

Aromatic hydrocarbon and hydrocarbon are semantically related. Sometimes you can replace phrase "Aromatic hydrocarbon" with "Hydrocarbon", this terms are similar.