How to pronounce medical terms

Medical vocabulary is the most consistently Greek and Latin vocabulary in English. Words like pneumonia, hypertension and stethoscope arrived ready-made from the classical languages, carrying their stress patterns with them, and English spelling then did what it always does with borrowed words: it kept the old letters while the sounds drifted. The result is a set of words in which the spelling regularly lies — silent ps, silent ths, and stress that lands somewhere the eye does not expect.

The good news is that Greek-derived words follow rules of their own, and those rules are more reliable than most of English. Once you learn where the stress falls in a medical term, the vowels around it nearly always reduce to a schwa and the word mostly pronounces itself. This guide gives you the words patients, nurses and doctors actually say out loud, each with audio you can play in your own accent.

Words ending in -itis stress the syllable before it. The itis suffix means inflammation, and the word stresses the name of the body part, which sits directly in front of it: bron-CHI-tis, arth-RI-tis, hep-a-TI-tis. If you have ever wondered why the stress sits where it does, this one rule is the explanation for a whole family of diagnoses.

The ph is always an f, and Greek p can be silent. The starter pn in pneumonia is unpronounceable in English, so the p was dropped centuries ago. pneumonia is simply noo-MOH-nyuh.

The th in medical words is usually the voiceless /θ/, the sound in think — as in stethoscope, anesthesia and therapy. The voiced /ð/ of this is reserved mostly for everyday grammar words, so defaulting to the voiceless version in medical vocabulary is rarely wrong. For the fuller story, see the TH guide.

Not everything is Greek. cholesterol mixes Greek roots with a very English rhythm: the first vowel reduces to a schwa, the stress lands on the second syllable, and the tail is said quickly — kuh-LES-tuh-rol. asthma is the reverse problem: everything is spelled, but the th is silent, leaving AZ-muh. And Alzheimer's, a German name, gives you a ts where the letter z suggests a z — the same sound change that made Nazi and pizza keep their ts in English. If you say ALLZ-hy-muhrz with a soft z, you are in very large company, but the medical pronunciation is the one with the ts.

When you meet an unfamiliar medical term, the pattern to look for is the second-or-third-syllable stress: almost nothing in this vocabulary is stressed on the first syllable the way ordinary English prefers. Hearing the stressed syllable correctly matters more than perfecting any individual vowel — listeners track stress before they track vowels.

One habit makes every word in this list easier to say: let the unstressed syllables reduce. In cholesterol, the first vowel is not a clear o but a quick schwa; in hypertension, the ending is not a full sound but a short weak syllable. English compresses everything around the stressed syllable, and forcing every letter to sound full is what makes medical vocabulary sound hesitant. Say the stressed syllable clearly — LES, PEE, KY, REE — and let the rest blur, and the word will come out closer to the native pattern than any deliberate effort to pronounce each letter. That single adjustment fixes more medical mispronunciations than memorising lists.

Q: Why is the p silent in pneumonia but not in pneumatic?
A: Both come from Greek pneuma (breath), and in both the p is silent in standard English: noo-MOH-nyuh and noo-MAT-ik. The letter stayed in the spelling because Greek words were borrowed through writing, not speech.

Q: Is it al-ZHEIM-erz or alz-HY-merz?
A: The standard pronunciation is ALTS-hy-muhrz — stress on the first syllable, with a ts sound and a long i in the middle. The "allz" version is extremely common but considered a mispronunciation by dictionaries.

Q: Do doctors and nurses pronounce these differently from ordinary people?
A: Occasionally. Medical staff are more likely to use the full classical form — an-uhs-THEE-zhee-uh for anaesthesia, for example — while everyday speakers compress. Both are understood; matching your listener is a fine goal, matching the dictionary is a safer one.

Silent letters — the general rule behind the silent p and th here. Word stress — why the stressed syllable is the part listeners hear first. The TH sounds — for the /θ/ that anchors most of this vocabulary.

Read slowly first. Pronounce each syllable deliberately before trying to blend them at full speed. Rushing hides the vowel and consonant shapes your ear needs to learn.

Record yourself. Most phones have a voice memo app — record a word, then compare it to the playback here. Hearing the gap between your version and the model accent makes targeted practice far easier.

Focus on one accent. Jumping between American, British and Australian in the same session creates confusion. Pick the accent you encounter most and stick with it until the patterns feel natural.

Every word above is a button. Set the accent and voice you want on the main screen, then come back — the guides use whatever you chose. To hear two accents against each other, use Compare; to test whether you can actually hear a contrast, use the listening quiz.