무라오어의 단모음은 총 11개이다.
| 고저 | 전후 | 원순 | 음소 |
| high | front | unrounded | i |
| high | back | unrounded | u |
| high mid | front | unrounded | e |
| central | mid | rounded | ə |
| low mid | front | unrounded | ɛ |
| low | front | unrounded | a |
| mid | front | rounded | ɔ |
| mid | back | rounded | o |
| close | front | rounded | y |
| close-mid | front | rounded | ø |
| ɿ |