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Learning to distinguish between similar vowel sounds is a crucial part of mastering English pronunciation. The minimal pair /ɑː/ vs. /oʊ/ can be especially challenging for English learners, as both sounds often appear in common, everyday words. This post explains how these vowels differ, how to pronounce them correctly, and how to practice them to speak more naturally and clearly.
How to Distinguish the /ɑː/ vs. /oʊ/ Sounds?
What Are /ɑː/ and /oʊ/?
| Sound | Description |
|---|---|
| /ɑː/ | A long, open back vowel. Your mouth opens wide, and your tongue is low and pulled back. As in car, start, father. |
| /oʊ/ | A diphthong that starts mid-back and moves up toward the near-close position. Lips start rounded and become more neutral. As in go, no, hope. |
How to Pronounce /ɑː/ and /oʊ/
/ɑː/
- Long, steady sound
- Mouth wide open
- Tongue low and back
- No movement
- Examples: car, start, heart
Look at this diagram to see how to shape your mouth when saying /ɑː/
Let’s play the audio so you can hear the /ɑː/ sound by itself and in the example word “father.”
/oʊ/
- Two-part glide
- Starts mid-back with rounded lips
- Moves up and slightly forward
- Notice the “o” + “ʊ” combination
- Examples: go, home, no
Observe this picture to learn the mouth position for pronouncing /oʊ/.
Let’s listen to a recording of the /oʊ/ sound and hear it used in “note.”
Example Sentences of Minimal Pairs with /ɑː/ vs. /oʊ/
Read these pairs aloud to hear and feel the difference:
cart / coat:
- Please push the cart inside.
- Please wear your coat inside.
lark / lobe:
- The lark sings in the morning.
- He injured his ear lobe.
mark / mope:
- She put a mark on the page.
- Don’t just mope around all day.
park / poke:
- We will park near the entrance.
- Don’t poke the cake.
Minimal Pairs /ɑː/ and /oʊ/ List
| /ɑː/ Word | /oʊ/ Word |
|---|---|
| cart /kɑːt/ | coat /koʊt/ |
| lark /lɑːk/ | lobe /loʊb/ |
| mark /mɑːk/ | mope /moʊp/ |
| park /pɑːk/ | poke /poʊk/ |
| heart /hɑːt/ | hope /hoʊp/ |
| dark /dɑːk/ | dope /doʊp/ |
| start /stɑːt/ | stone /stoʊn/ |
| far /fɑː/ | foe /foʊ/ |
| bar /bɑː/ | boat /boʊt/ |
| part /pɑːt/ | pole /poʊl/ |
| hard /hɑːd/ | hoed /hoʊd/ |
| palm /pɑːm/ | poem /ˈpoʊəm/ |
| car /kɑː/ | code /koʊd/ |
| mar /mɑː/ | mow /moʊ/ |
| jar /dʒɑː/ | Joe /dʒoʊ/ |
| star /stɑː/ | stow /stoʊ/ |
| yarn /jɑːn/ | yoke /joʊk/ |
| guard /ɡɑːd/ | goad /ɡoʊd/ |
| barn /bɑːn/ | bone /boʊn/ |
| lark /lɑːk/ | lope /loʊp/ |
| calm /kɑːm/ | comb /koʊm/ |
| farm /fɑːm/ | foam /foʊm/ |
| charm /tʃɑːm/ | choke /tʃoʊk/ |
| large /lɑːdʒ/ | load /loʊd/ |
| hard /hɑːd/ | home /hoʊm/ |
| balm /bɑːm/ | bowl /boʊl/ |
| bard /bɑːd/ | bode /boʊd/ |
| cark /kɑːk/ | coke /koʊk/ |
| tar /tɑː/ | toad /toʊd/ |
| starve /stɑːv/ | stove /stoʊv/ |
| char /tʃɑː/ | rope /roʊp/ |
| yard /jɑːd/ | loan /loʊn/ |
| father /ˈfɑːðə/ | foal /foʊl/ |