High back vowels:
* u: like the vowel in "flute"
* ʊ: like the vowel in "put"
* ɯ: a sound not found in English, but similar to the "oo" sound in "book" when pronounced with lips rounded
Mid back vowels:
* o: like the vowel in "boat"
* ɔ: like the vowel in "caught"
* ʌ: like the vowel in "but"
Low back vowels:
* ɑ: like the vowel in "father"
* ɒ: like the vowel in "cot"
Note: The exact pronunciation of these vowels can vary depending on the language and dialect.
Examples of words with back vowels:
* u: flute, moon, shoe
* ʊ: put, book, pull
* o: boat, go, toe
* ɔ: caught, law, thought
* ʌ: but, cup, love
* ɑ: father, car, start
* ɒ: cot, hot, dog
These are just some examples. There are many other back vowels that exist in different languages.