Underside
Part of speech: noun
Definition: The side that is below or underneath, the bottom.
Undersurface
Part of speech: noun
Definition: The underneath surface; the bottom, or underside
Underside as a noun is the side that is below or underneath, the bottom. while Undersurface as a noun is the underneath surface; the bottom, or underside
Part of speech: noun
Definition: The side that is below or underneath, the bottom.
Part of speech: noun
Definition: The underneath surface; the bottom, or underside
We hope you now know whether to use Underside or Undersurface in your sentence.