S and Z Minimal Pairs: Word Lists and How to Use Them

S and z minimal pairs are word pairs that differ by only one sound: the /s/ in one word and the /z/ in the other, with everything else the same. “Sip” and “zip,” “bus” and “buzz,” “price” and “prize” are minimal pairs. They are used in speech therapy and phonics to train the ear and mouth to tell the two sounds apart. Below are word lists sorted by position, the one difference between the sounds, and how to drill them.

What makes /s/ and /z/ a minimal pair

The two sounds are made in the same place, with the tongue tip near the ridge behind the top teeth, and in the same way, by forcing air through a narrow gap. The single difference is voicing: /z/ is voiced, meaning the vocal cords vibrate, and /s/ is voiceless, meaning they do not. You can feel it by putting a hand on your throat: “zzz” hums, “sss” does not. Because only voicing changes, /s/ and /z/ words that are otherwise identical form minimal pairs, and hearing the contrast is exactly the skill the pairs are built to train.

S and Z minimal pairs at the start of a word

Initial-position pairs, where the target sound comes first.

sip / zip, sue / zoo, seal / zeal, sink / zinc, sap / zap, sag / zag, said / zed, Sam / zam, sing / zing, sipper / zipper

Initial /z/ is less common in English than initial /s/, so this list is shorter than the final-position list. Words like “zip,” “zoo,” and “zinc” are the reliable ones.

S and Z minimal pairs at the end of a word

Final position is where /s/ and /z/ contrast most often, because it carries grammar: many plurals and verb endings are voiced /z/ even when spelled with an s.

bus / buzz, price / prize, ice / eyes, peace / peas, niece / knees, loose / lose, place / plays, race / raise, dose / doze, fleece / fleas, hiss / his, gross / grows, piece / peas

Note the spelling trap: “eyes,” “plays,” and “raise” end in the /z/ sound even though they are not spelled with a z. Minimal-pair work targets the sound, not the letter.

S and Z minimal pairs in the middle of a word

Medial pairs train the contrast between vowels, which some speakers find hardest.

fussy / fuzzy, lacy / lazy, racer / razor, ceasing / seizing, looser / loser, prices / prizes, deceased / diseased

How to drill S and Z minimal pairs

Work in a clear order. Start with listening: say two words and have the student point to the one they hear, or thumbs-up if the two words are the same or different. This builds the ear before the mouth. Then move to production: the student says the pair and a partner identifies which sound was made, so the speaker gets immediate feedback on whether the contrast came through. Use the throat-and-hand check for voicing, since /z/ is the harder target for many learners and the vibration gives them something concrete to aim for. Keep sessions short and mix positions once the initial and final lists are solid. For young children, cards with a picture of each word turn the drill into a matching game.

Why final position matters most

Because English marks plurals and third-person verbs with a /z/ sound that is spelled s, a learner who defaults to /s/ will say “he play” as “he playss” instead of “playz,” or blur “eyes” into “ice.” Drilling final-position pairs fixes a pattern that affects grammar, not just single words, which is why speech and phonics programs weight this position heavily.

FAQ

What is an example of an S and Z minimal pair?

“Sip” and “zip,” “bus” and “buzz,” and “price” and “prize” are all S and Z minimal pairs, differing only in the /s/ versus /z/ sound.

What is the difference between the S and Z sounds?

They are made the same way in the same place; the only difference is voicing. /z/ vibrates the vocal cords and /s/ does not. Put a hand on your throat and “zzz” hums while “sss” is silent.

Why are S and Z minimal pairs used in speech therapy?

They isolate a single contrast, so a learner can practice hearing and producing the difference between two sounds without any other change to the word.

Why does spelling not always match the sound?

Many English words spelled with s end in the /z/ sound, like “eyes,” “plays,” and “raise.” Minimal-pair work targets the sound rather than the letter, so these count as /z/ words.