iPhone Hardcase 4 4S 5 5C 5S 6 6S 7 8 X PLUS

You don't need the space between 'hard' and 'case' ebay will show any listings with 'hardcase' or 'hard case' in the title regardless of which way it's put in the search bar. So that's 1 character I guess.

If you gave us an example of the 'other words' it might help.