How Do I make one word in a cell vertical and the other horizonta

I am trying to create tabs for an Index label. How do you make the number of
the chapter Vertical & the title Horizontal..

Interesting concept, but I don't think you can.

You could use a helper cell (a column to the left of the cell you are viewing) which was one character wide, and had 'Wrap Text' set in Format Cells, Alignment.
You could also rotate this text by 90° if required.
Hope this helps.