SOUND CONTRAST

Full vs fool: how to say /ʊ/ and /uː/

Full uses relaxed lips and a lower tongue, while fool uses firm rounding and a higher one. Practice /ʊ/ and /uː/ with minimal pairs and mouth cues.

/ʊ/ ≠ /u/ · /uː/

Hear the difference in your own voice

Voice settings

What your mouth is doing

For fool, the lips round firmly and the tongue rises high. For full, the lips loosen, the tongue drops a little and the sound is shorter. Tension is your main physical cue: try feeling it at the corners of your lips.

Comparing with Mandarin and Spanish

Spelling oo appears in both groups (book and food), so listen before you trust the letters. The final dark l in both words also pulls the tongue back, which can make the vowels harder to hear.

Mandarin wu and Spanish u sit close to fool, and shortening them does not produce full. Relax your lips and lower your tongue for the vowel in full.

Build the sound, step by step

Say fool with firm, round lips, and hold it for a moment.
Relax your lips and drop your tongue a little until you reach the vowel in full.
Read each pair, then say the sentence, keeping the final l of full and pull clear.

The fool could pull a full pool cover.

What to watch for

Keeping tight lips for both words removes the main difference.
Reading could, should and would with a pronounced l follows spelling. That l is silent.

References & editorial notes

PronounceKit wrote this lesson as practical guidance. The references below describe the sounds; the comparisons with other languages are editorial teaching suggestions. It describes common American and British patterns, not every accent, and it has not been independently reviewed by a pronunciation specialist. The mouth model is a simplified teaching aid, not a validated simulation.

Published 3 November 2026