The following are the most commonly heard sounds of Umonhon and their orthographic (written) representation.
| Letter | Umonhon example | English example |
| a | ská (white) | father |
| b | biamá (they say) | boy |
| ch | chéshka (short) | church |
| chʰ | íⁿchʰoⁿ (right now) | church |
| d | dúba (four) | dog |
| e | shé (apple) | weight, Las Vegas |
| ɛ | hɛ (louse) | bet |
| ɛⁿ | hithɛⁿkithe (hurry) | hen |
| g | égoⁿ (like that) | girl |
| h | huhú (fish) | high |
| i | ní (water) | radio |
| in | wíⁿ (one) | mean (with a soft n) |
| j | júba (a little bit) | judge |
| k | ké (turtle) | skate |
| kʰ | akʰí (I return home) | key |
| m | mí (sun) | man |
| n | nú (man) | no |
| on | óⁿba (day) | yawn (with a soft n) |
| p | pá (nose) | spit |
| pʰ | óⁿ pʰoⁿ (elk) | pot |
| s | sábe (black) | sun |
| sh | shé (apple) | ship |
| t | té (bison) | stop |
| tʰ | a tʰí (I'm here) | top |
| th | tháwa (to count) | that |
| u | tú (blue) | blue |
| w | waʔú (woman) | wing |
| x | xubé (holy) | Bach (voiceless, raspy) |
| gh, ğ | ğáge (cry, weep) | Bach (voiced, soft) |
| z | zí (yellow) | zoo |
| zh | zhíⁿga (small) | beige |
| ʔ | tʔé (dead) | uh-oh (glottal stop) |
Marking stress on the correct syllable is very important in Umónhon. Moving the accent mark can change the meaning of the word. For example: bthítube — "I pinch," becomes bthitúbe — "I chop," while wáthathe — "table," becomes watháthe — "food."