The Letter O In American English

The Letter "O" in the English Alphabet

The fifteenth letter of the English alphabet is 'O'. It is also the fourth vowel in the English language.

Vowels are sounds that are pronounced without any restriction in the vocal tract. It means we can produce it with the unrestricted flow of air.

Uppercase Form

O

Lowercase

o

Name

o (pronounced /əʊ/)

Common Sounds

/ɒ/, /əʊ/, /uː/, /ʌ/, /ə/

The Letter O: Sounds

Vowels in the English language can have many many sounds. Here we will look at some of its common ones.

Common Sounds

Sound 1: /ɒ/

'o' sounds /ɒ/:

Example

clock /klɒk/

stop /stɒp/

orange /ˈɒr.ɪndʒ/

Sound 2: /əʊ/

'o' also sounds /əʊ/:

Example

potato /pəˈteɪ.təʊ/

hotel /həʊˈtel/

radio /ˈreɪ.di.əʊ/

Sound 3: /uː/

'o' can also sound /uː/:

Example

to /t/

movement /ˈmv.mənt/

lose /lz/

Sound 4: /ʌ/

'o' also sounds /ʌ/:

Example

mother /ˈmʌð.ə(r)/

honey /ˈhʌn.i/

oven /ˈʌv.ən/

Sound 5: /ə/

'o' sounds /ə/:

Example

bacon /ˈbeɪ.kən/

lemon /ˈlem.ən/

mirror /ˈmɪr.ə(r)/

Other Sounds

Sound 6: /ʊ/

'o' sounds /ʊ/:

Example

wolf /wʊlf/

woman /ˈwʊm.ən/

Sound 7: /wʌ/

'o' also sounds /wʌ/:

Example

once /ns/

one /n/

Tip!

'o' can also sound /ɪ/ in the word 'women':

Example

women /ˈwɪm.ɪn/

The Letter O: Multigraphs

'O' can also appear in combination with other letters (mainly vowels and sometimes consonants). They can create distinct vowels:

oo

'oo' commonly has four sounds:

/uː/

/ʊ/

/ʌ/

/ɔː/

1. 'oo' sounds /uː/:

Example

tooth /tθ/

broom /brm/

spoon /spn/

2. 'oo' in the middle of words sounds /ʊ/:

Example

foot /fʊt/

hook /hʊk/

book /bʊk/

3. 'oo' also sounds /ʌ/ in some words:

Example

blood /blʌd/

flood /flʌd/

4. 'oo' can also sound /ɔː/:

Example

door /dɔː(r)/

poor /pɔː(r)/

floor /flɔː(r)/

oa

'oa' commonly has two sounds:

/əʊ/

/ɔː/

1. 'oa' mainly sounds /əʊ/:

Example

goat /ɡəʊt/

coach /kəʊtʃ/

coat /kəʊt/

2. 'oa' sounds /ɔː/:

Example

broad /brɔːd/

board /bɔːd/

roar /rɔː(r)/

oe

'oe' commonly has two sounds:

/əʊ/

/uː/

1. 'oe' sounds /əʊ/:

Example

doe /dəʊ/

hoe /həʊ/

toe /təʊ/

2. 'oe' at the end of words sounds /uː/:

Example

shoe/

canoe /kəˈn/

Tip!

'oe' sounds /ʌ/ in the word 'does':

Example

does /dʌz/

'oe' sounds /iː/ in French loanwords:

Example

phoenix /ˈf.nɪks/

foetal /ˈf.təl/

foetus /ˈf.təs/

eo

'eo' sounds /ə/:

Example

sturgeon /ˈstɜː.dʒən/

dungeon /ˈdʌn.dʒən/

pigeon /ˈpɪdʒ.ən/

Tip!

'eo' in the word people sounds /iː/:

Example

people /ˈppl/

oi

'oi' commonly has two sounds:

/ɔɪ/

/ə/

1. 'oi' sounds /ɔɪ/:

Example

joint /dʒɔɪnt/

coin /kɔɪn/

toilet /ˈtɔɪ.lət/

2. 'oi' also sounds /ə/:

Example

tortoise /ˈtɔː.təs/

porpoise /ˈpɔː.pəs/

ou

'ou' commonly has six sounds:

/aʊ/

/ʌ/

/uː/

/əʊ/

/ə/

/ɔː/ or /ʊə/

1. 'ou' in the middle of words has four sounds; the first one is /aʊ/:

Example

house /hs/

cloud /kld/

mountain /ˈmn.tɪn/

2. 'ou' also sounds /ʌ/:

Example

touch /tʌtʃ/

tough /tʌf/

cousin /ˈkʌz.ən/

3. 'ou' also sounds /uː/:

Example

group /ɡrp/

soup /sp/

you /j/

4. 'ou' also sounds /əʊ/:

Example

shoulder /ˈʃəʊldə(r)/

boulder /ˈbəʊldə(r)/

soul /səʊl/

5. 'ou' at the end of words sounds /ə/:

Example

enormous /ɪˈnɔː.məs/

famous /ˈfeɪ.məs/

6. 'ou' also sounds /ɔː/ or /ʊə/ in the word tour and its combinations:

Example

contour /ˈkɒn.tɔː(r)/ or /ˈkɒntʊə(r)/

tour /tʊə(r)/, /tɔː(r)/

tourist /ˈtʊə.rɪst/, /ˈtɔː.rɪst/

Tip!

'eou' in eous and 'iou' in ious sound /ə/:

Example

outrageous /ˌaʊtˈreɪ.dʒəs/

contagious /kənˈteɪ.dʒəs/

Warning

In the word 'cough', the letters 'ou' sound /ɒ/:

Example

cough /kɒf/

our

'our' commonly has two sounds:

/ɔː/

/ə/

1. 'our' mainly sounds /ɔː/:

Example

four /fɔː(r)/

court /kɔːt/

pour /pɔː(r)/

2. 'our' also sounds /ə/ at the end of words:

Example

harbour /ˈhɑːbə(r)/

vapour /ˈveɪpə(r)/

labour /ˈleɪbə(r)/

ough

'ough' commonly has four sounds:

/aʊ/

/əʊ/

/ɔː/

/ə/

1. 'ough' sounds /aʊ/, in other words, 'gh' is silent in these cases:

Example

drought /drt/

bough /b/

2. 'ough' sounds /əʊ/ in some words:

Example

although /ɔːlˈðəʊ/

doughnut /ˈdəʊnʌt/

3. 'ough' also sounds /ɔː/:

Example

thought /θɔːt/

brought /brɔːt/

sought /sɔːt/

4. 'ough' also sounds /ə/ if it is placed at the last syllable:

Example

thorough /ˈθʌrə/

borough /ˈbʌrə/

ow

'ow' commonly has two sounds:

/əʊ/

/aʊ/

1. 'ow' sounds /əʊ/:

Example

window /ˈwɪn.dəʊ/

snow /snəʊ/

bowl /bəʊl/

2. 'ow' also sounds /aʊ/:

Example

owl /l/

cow /k/

town /tn/

oy

'oy' sounds /ɔɪ/:

Example

toy /tɔɪ/

oyster /ˈɔɪ.stə(r)/

royal /ˈrɔɪ.əl/

or

'or' commonly has two sounds:

/ɔː/

/ɜː/

1. 'or' sounds /ɔː/:

Example

fork /fɔːk/

scorpion /ˈskɔː.pi.ən/

stork /stɔːk/

2. 'or' also sounds /ɜː/:

Example

word /wɜːd/

world /wɜːld/

work /wɜːk/

Tip!

'ot' at the last syllable of French loanwords sounds /əʊ/:

Example

escargot /ɪˈskɑː.ɡəʊ/

Peugeot /ˈpɜːʒəʊ/

The Letter O: Uses

The letter 'O' is used as
The vocative case in titles, before a noun, usually capitalized; for example O Canada or O Lord, save thy people
'Zero' when saying phone numbers, etc. like: My number is six o double three (= 6033)
The symbol for the chemical element oxygen

Comments

(2)
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chk
Feb 2024
Thank you so much for this amazing compilation, GREAT info !
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Vijay Rawat
Dec 2023
Thanks for this brilliant article .. I appreciate the great efforts put in by the writer.
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