Impose same font size for all chars

[stevencunningham]

I have a problem inserting a non-Word text document into my Word document because in the older document the exponents were considered as having a smaller size font than normal characters, contrary to Word practice.
As a result exponents are poorly rendered ; the obvious correction is to reset the font size for each individual exponent character, but as there are hundreds of them it is a bit tedious to do it by hand.
Any ideas ?