Word - Insert Key

Word does support using Insert to toggle overtype, but you need to enable it first:

1. Go to File > Options > Advanced.
2. Under Editing options, check Use the Insert key to control overtype mode.
3. Click OK. Insert will then switch between inserting text and replacing existing text.

For tables, Insert doesn’t have the same row-insertion function as in Project. The quickest built-in options are:

• Add a row at the end: click in the table’s last cell and press Tab.
• Add several rows in the middle: select the same number of existing rows as you want to add, then choose Table Layout > Insert Above or Insert Below. Selecting three rows inserts three new rows.
• Repeat an insertion: after inserting a row, press F4 to repeat the last action where applicable.

So the overtype behaviour is available through a setting, while “Insert adds a table row” would be a feature request or require a custom macro. For adding several rows at once, selecting multiple rows before inserting is usually the simplest approach.