Hum and Sang

Hum noun - A monotonous sound like that of an insect in motion.

Sang and hum are semantically related in singing topic. In some cases you can use "Sang" instead a noun "Hum".

Sang noun - North American woodland herb similar to and used as substitute for the Chinese ginseng.

Hum and sang are semantically related in singing topic. You can use "Hum" instead the word "Sang" as a verb or a noun.