Electric furnace and Furnace

Electric furnace noun - Any furnace in which the heat is provided by an electric current.

Furnace and electric furnace are semantically related. In some cases you can use "Furnace" instead a noun phrase "Electric furnace".

Furnace noun - An enclosed chamber in which heat is produced to heat buildings, destroy refuse, smelt or refine ores, etc..

Electric furnace and furnace are semantically related. Sometimes you can replace phrase "Electric furnace" with "Furnace", this terms are similar.