Creating a list of terms, concepts, etc.

Best to start with a simple table containing the columns you have in mind, one column for every type of information you want to store. Use a single row of cells to name each header and convert that range to a table (Insert tab, Table button). For new terms you simply type them into the term column. Later, when you're ready to add more information you can filter the table for empty columns so you know where new data needs to be entered. If you set up a conditional format on the keyword column to highlight duplicates, anything you enter that already exists will highlight.