Denatured alcohol and Grain alcohol

Denatured alcohol noun - Ethyl alcohol that is unfit for drinking but is still useful for other purposes.

Grain alcohol and denatured alcohol are semantically related. In some cases you can use "Grain alcohol" instead a noun phrase "Denatured alcohol".

Grain alcohol noun - The intoxicating agent in fermented and distilled liquors; used pure or denatured as a solvent or in medicines and colognes and cleaning solutions and rocket fuel; proposed as a renewable clean-burning additive to gasoline.

Denatured alcohol and grain alcohol are semantically related. Sometimes you can replace phrase "Denatured alcohol" with "Grain alcohol", this phrases are similar.