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Minimal Pairs Word List
S vs Z Minimal Pairs
10 free S–Z minimal pairs, sorted by position and ready to practice — the word list for voicing, when sip comes out as zip.
What are S vs Z minimal pairs?
The /s/ and /z/ sounds are made the same way — the tongue rides just behind the top teeth while a thin stream of air hisses through. The only difference is the voice: /z/ turns the vocal cords on and buzzes, /s/ stays quiet. A minimal pair lines that switch up directly: sip and zip, bus and buzz, ice and eyes.
This list targets voicing errors on the hissing sounds — most often a /z/ that loses its buzz and comes out as /s/, so buzz becomes bus and eyes becomes ice. English also leans on this contrast constantly at the ends of words (plurals like peas, verbs like plays), which makes it worth getting right. Because the tongue does the same thing for both sounds, the pair turns the child's attention to the buzz — and sip and zip being different words is what makes the lesson stick.
Voicing is one of the phonological processes covered in our guide to phonological processes.
S vs Z word pair list 10 pairs
Grouped by where the changing sound sits in the word. The sound that changes is highlighted in each pair.
At the start of the word (4)
- ice eyes
- sap zap
- sing zing
- sip zip
In the middle of the word (3)
- price prize
- fussy fuzzy
- rice rise
At the end of the word (3)
- bus buzz
- peace peas
- place plays
Why minimal pairs work
Minimal pairs work because they make a sound matter. When the only thing separating two words is a single sound, saying that sound the wrong way changes what the child actually said — key becomes tea, cap becomes tap. That built-in feedback turns an abstract “say it this way” into a concrete mix-up the child can hear and fix.
This is the heart of the phonological (contrast) approach: instead of drilling a sound in isolation, you give the child a reason to keep the two sounds apart. Many children start to self-correct once they notice the listener heard the wrong word — the meaning contrast does the teaching. It is an evidence-informed technique widely used by speech-language pathologists, and it works just as well at the kitchen table as in the therapy room.
How to use S/Z minimal pairs in therapy
A simple progression for SLPs and parents. If your child is in therapy, always follow your SLP's plan first.
- 1 Listen first. Read a batch of the pairs aloud so the child hears the S–Z contrast many times, with no pressure to say anything back yet. This "auditory bombardment" tunes the ear before the mouth.
- 2 Point to the right one. Lay out a few picture pairs, say one word, and have the child point to the matching picture. This checks that they can hear the difference before they have to produce it.
- 3 Copy you. Have the child repeat each word after you, starting with the picture pairs. Model slowly and let them watch your mouth.
- 4 Say it on their own. Have the child name the picture without a model. If both words come out the same, that mix-up is the teaching moment — show how the sound changes which word they said.
- 5 Carry it over. Move from single words into short phrases and everyday talk, and send a few pairs home so practice keeps going between sessions.
Featured picture pairs
The 7 pairs that have a picture for both words. Tap a card to hear the word, or tap “vs” to hear the pair back-to-back.
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bus
buzz -
ice
eyes -
peace
peas -
place
plays -
price
prize -
sap
zap -
sing
zing
Practice these pairs in Sound Safari
Run S/Z minimal-pair drills with built-in scoring and auto-generated progress notes.
S vs Z minimal pairs — frequently asked questions
What are S vs Z minimal pairs? +
S vs Z minimal pairs are words that differ by only one sound — an /s/ in one and a /z/ in the other — such as sip/zip, bus/buzz, and ice/eyes. Both sounds are made with the tongue in the same place; the only difference is whether the voice buzzes, which is exactly what the child practices.
What phonological process do S/Z minimal pairs target? +
They target voicing errors — most commonly devoicing, where the voiced /z/ is produced as a voiceless /s/ ("buzz" becomes "bus," "eyes" becomes "ice"). Because English plurals and verb endings often carry a /z/ sound, the contrast also protects meaning at the ends of words.
How do you use S and Z minimal pairs in speech therapy? +
Read the pairs aloud so the child hears the contrast, have them point to the word you say, then repeat each word, name the pictures on their own, and finally use the words in phrases and everyday talk. The buzz test helps: a hand on the throat feels /z/ vibrate while /s/ stays still — same tongue, different voice.
When do the S and Z sounds develop? +
Both /s/ and /z/ reach 90% mastery by around age 5 (McLeod & Crowe, 2018; Crowe & McLeod, 2020). If a child past that age is still swapping them, or is hard to understand, it is worth talking with a speech-language pathologist — and if the /s/ itself sounds slushy or comes out with the tongue between the teeth, ask about a lisp while you are there. This page is informational and is not a diagnosis.
Keep exploring
The full guides for each sound — norms, common challenges, how to practice, and word lists by position.
Related contrasts
Looking for more contrasts? Browse the full minimal pairs word list library.
