I am trying to design a website that has the word REP in it, but for some reason VoiceOver with Safari on Mac OSX keeps reading it as "Representative."

It reads properly in NVDA, JAWS and VoiceOver for iOS, however.

I looked at the Safari HTML reference page and it suggested:
<acronym title ="REP"> REP </acronym>
or <abbr title ="REP"> REP </abbr>

However no matter what I put in the title tag - it kept reading REP as Representative - even if I put in something like "Peach."

REP - Representative was not even in the pronunciation dictionary in the VoiceOver preference dialog which is supposed to list all of the abbreviation translations.

Does anybody have any idea on how I could get this just to read as "Rep" and not "Representative" in the VoiceOver/Safari on Mac configuration?