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Pronunciation · Minimal pairs · medium functional load

/ʊ/ vs /uː/ — full vs fool

In short

The short relaxed /ʊ/ and the long tense /uː/ separate pull/pool, look/Luke and full/fool. Fewer word pairs than /ɪ–iː/, but the same length-plus-tension mechanic. This contrast carries a MEDIUM functional load — the contrast separates a fair number of word pairs, so it is worth systematic practice once the high-load contrasts are stable.

How to hear (and make) the difference

/ʊ/ is short with loose lips; /uː/ is long with tightly rounded, pushed-forward lips. Whistle-shape your lips for 'fool'; relax everything for 'full'.

Most challenging for Spanish, Arabic, Japanese, Turkish, Farsi speakers.

5 minimal pairs with audio

Play each side and copy it. Then read the pairs aloud — can a listener tell which word you said?

  • full/fʊl/
    fool/fuːl/
  • pull/pʊl/
    pool/puːl/
  • look/lʊk/
    Luke/luːk/
  • soot/sʊt/
    suit/suːt/
  • could/kʊd/
    cooed/kuːd/

Test your ear

Perception comes before production: if you can't hear the contrast, you can't say it reliably. Free, unlimited, different voices each round.

Listening drill

/ʊ/ vs /uː/ — full vs fool

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/ʊ/ is short with loose lips; /uː/ is long with tightly rounded, pushed-forward lips. Whistle-shape your lips for 'fool'; relax everything for 'full'.

The contrast in sentences

Same sentence frame, different word — say both versions and make them unmistakably different.

  • The glass is full.

    The glass is fool.

  • Pull over there.

    Pool over there.

Keep exploring

Frequently asked questions

What is the difference between full and fool?
full /fʊl/ uses the /ʊ/ sound while fool /fuːl/ uses /uː/. /ʊ/ is short with loose lips; /uː/ is long with tightly rounded, pushed-forward lips. Whistle-shape your lips for 'fool'; relax everything for 'full'.
What are minimal pairs and why practise them?
Minimal pairs are word pairs that differ by exactly one sound (ship/sheep). Practising them trains your ear and mouth on the single difference that separates the words — perception research (high variability phonetic training) shows this transfers to real speaking.
Which learners find the /ʊ/ vs /uː/ contrast hardest?
It is most challenging for Spanish, Arabic, Japanese, Turkish, Farsi speakers, whose first languages don't separate these two sounds.
Do these pairs matter for IELTS Speaking?
They help. IELTS scores intelligibility, so contrasts that change word meaning matter most — this one is worth practising once the high-priority vowel contrasts are stable.

Next step

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