Striation and Underscore

Striation noun - Any of a number of tiny parallel grooves such as: the scratches left by a glacier on rocks or the streaks or ridges in muscle tissue.

Underscore and striation are semantically related. In some cases you can use "Underscore" instead a noun "Striation".

Underscore noun - A line drawn underneath (especially under written matter).

Striation and underscore are semantically related. Sometimes you can use "Striation" instead a noun "Underscore".