Yes, many.
Including, but not limited to:
- [ ] hair space :
 
or 
- [ ] 6-per-em space :
 
(no character reference available) - [ ] narrow no-break space :
 
(no character reference available) - [ ] thin space :
 
or 
- [ ] 4-per-em space :
 
or 
- [ ] non breaking space :
 
or
- [ ] punctuation space :
 
or 
- [ ] 3-per-em space :
 
or 
- [ ] en space :
 
or 
- [ ] figure space :
 
or 
- [ ] em space :
 
or 
span{background-color: red;}
<table>
<tr><td>non breaking space:</td><td> <span> </span> or <span> </span></td></tr>
<tr><td>narrow no-break space:</td><td> <span> </span></td></tr>
<tr><td>en space:</td><td> <span> </span> or <span> </span></td></tr>
<tr><td>em space:</td><td> <span> </span> or <span> </span></td></tr>
<tr><td>3-per-em space:</td><td> <span> </span> or <span> </span></td></tr>
<tr><td>4-per-em space:</td><td> <span> </span> or <span> </span></td></tr>
<tr><td>6-per-em space:</td><td> <span> </span></td></tr>
<tr><td>figure space:</td><td> <span> </span> or <span> </span></td></tr>
<tr><td>punctuation space:</td><td> <span> </span> or <span> </td></tr>
<tr><td>thin space:</td><td> <span> </span> or <span> </span></td></tr>
<tr><td>hair space:</td><td> <span> </span> or <span> </span></td></tr>
</table>