Conditional Formatting Specific Text Containing ONLY

I have a conditional formatting rule that checks for misspellings of client names.

My employees input client names into a spreadsheet, and I need for the spreadsheet to notify them via a fill color if they have misspelled the name.

So, I set up a rule for each client name using the specific text criteria.

The rule simply checks for the client's name, and fills the cell green if the client's name is correct. If the client's name is misspelled, then the cell remains unfilled.

This works great if the client's name is spelled correctly, or spelled incorrectly.

But there's one hitch:

If the client's name is spelled correctly, but there is some extra character(s) inputted after the client's name, the cell is still filled green even though the data in the cell is useless because the extra character will cause it to be rejected by the next party down the line in the value chain.

So I'm hoping to find a way to make the specific text containing criteria operate with only the specific text I specify and no extra characters or anything after the specific text.