Notepad and Workbook

Notepad noun - A number of sheets of writing paper glued together at one edge.

Workbook and notepad are semantically related. In some cases you can use "Workbook" instead a noun "Notepad".

Workbook noun - A student's book or booklet containing problems with spaces for solving them.

Notepad and workbook are semantically related. Sometimes you can use "Notepad" instead a noun "Workbook".