However, here are a few possibilities, depending on how strict you want the rhyme to be:
* "Around" - This is a common phrase that could be considered a proper noun in certain contexts.
* "Bound" - While not a common name, it could be a possible surname.
* "Found" - Similar to "Bound," this isn't typically a name, but could be used as one.
Remember, rhymes can be subjective, and some might consider other options like "crowned" or "renowned" as being close enough to "sound" in a rhyming context.