Claire Costello is a licensed Speech-Language Pathologist with 36 years of clinical experience offering online communication coaching for multilingual professionals via Zoom, available worldwide. A Free Communication Consult is available before any program commitment.
Some English words are spelled the same but pronounced differently depending on how they are used. The shift is small, often just one sound at the end of the word, but it carries meaning. When the shift is missing, the listener may need a moment to adjust. In fast professional communication, that moment can matter.
Many of these pairs follow a common pattern. The noun or adjective often ends with a voiceless /s/ sound: short, crisp, no vibration. The verb form often ends with a voiced /z/ sound: the vocal cords are active and the sound has a slight buzz. The spelling stays the same. The sound changes.
The Pattern
The difference between /s/ and /z/ is one of vibration. For /s/, the tongue is in position but the vocal cords are silent. For /z/, everything is the same except the vocal cords are on. Place two fingers lightly on your throat and say each sound. You will feel the vibration for /z/ and nothing for /s/.
This is the distinction that separates the two forms in each pair below.
The Most Common Pairs
Abuse (noun and verb)
Noun: “That’s verbal abuse.” (uh-BYEWS)
Verb: “Don’t abuse your privileges.” (uh-BYEWZ)
Notice how the final S changes. As a noun, the /s/ is voiceless, short, and crisp. As a verb, it becomes voiced and sounds like a /z/.
Advice and Advise
Noun: “Can I give you some advice?” (ahd-VAIS)
Verb: “I’d advise you to get a second opinion.” (ahd-VAIZ)
These two words are spelled differently, but they follow the same /s/ and /z/ pattern, so they belong in this group.
Close (adjective and verb)
Adjective: “That was a close call.” (KLOHS)
Verb: “Please close the door.” (KLOHZ)
The spelling is the same, but the final sound shifts from /s/ to /z/ depending on how the word is used.
Excuse (noun and verb)
Noun: “What’s your excuse for being late?” (ihk-SKYEWS)
Verb: “Please excuse the mess.” (ihk-SKYEWZ)
In both words the stress stays on the second syllable. Only the final sound changes.
House (noun and verb)
Noun: “The house is on the corner.” (HOWS)
Verb: “The hospital can house twenty patients.” (HOWZ)
Lose and Loose
Verb: “Don’t lose your keys.” (LEWZ)
Adjective: “The cat got loose again.” (LEWS)
These are not a noun and verb pair, and they are spelled differently, but they are worth including because the confusion is common. Lose is a verb, as in “Do not lose the chart,” and it ends with /z/. Loose is an adjective, as in “The connection is loose,” and it ends with /s/. The spelling differs by one letter, the sound differs by one sound, and the meanings are different.
Use (noun and verb)
Noun: “That’s a good use of time.” (YEWS)
Verb: “I could really use some help.” (YEWZ)
Once again, the voiced and voiceless endings carry the difference.
Why This Matters in Professional Settings
In clinical and aviation communication, these words appear regularly. Abuse, advice, advise, use, close, and house come up in patient conversations, documentation, handoffs, and crew exchanges. When the two forms sound the same, the listener relies more heavily on context to determine the meaning, which adds a small processing load to every exchange.
Producing the distinction accurately can reduce that load. The listener gets the meaning from the sound, not only from the sentence around it.
Some pairs change stress instead of a final sound. You can read about those in English Word Stress: When Noun and Verb Pronunciation Change Meaning.
How to Practice
Start with one pair per week. Take close as an example. Say the adjective form with a clear /s/ at the end and notice that there is no vibration. Then say the verb form with a clear /z/ and feel the buzz in your throat. Alternate between the two until the switch feels easier.
Then practice each form in a sentence you would actually say at work. Say “That was a close call,” followed by “Please close the door.” Say each sentence at natural conversational speed. Record yourself and listen specifically for whether the final sound is voiced or voiceless.
With focused practice, the switch can become more reliable and automatic.
Noun and Verb Pronunciation FAQ
What is the difference between /s/ and /z/ in English noun and verb pairs? Both sounds are made with the tongue in the same place. For /s/ the vocal cords are silent, and for /z/ they vibrate. In many pairs, the noun ends in /s/ and the verb ends in /z/.
How do you pronounce use as a noun and as a verb? As a noun, use ends with /s/ and sounds like YOOS. As a verb, it ends with /z/ and sounds like YOOZ.
Is excuse pronounced differently as a noun and a verb? Yes. The stress stays on the second syllable in both, and the final sound changes from /s/ for the noun to /z/ for the verb.
Does working on these pairs mean losing my accent? No. The goal is to be understood the first time while still sounding like yourself.
This is communication coaching for fluent professionals, not treatment of a speech disorder.
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