Faze is a verb meaning to disturb, unsettle, or worry someone (nothing fazes her; he wasn’t fazed). Phase is usually a noun meaning a stage in a process (a difficult phase, a phase of the moon), and a verb in phase in and phase out. They are homophones — both pronounced /feɪz/ — so only the spelling tells them apart. The common error “it didn’t phase me” should be faze.
Faze and phase are easy to mix up because they sound exactly the same. Words that share the same pronunciation but have different meanings and spellings are called homophones. Your ear cannot separate them, so you must rely on meaning and spelling to choose correctly. The trickiest part is that faze is much rarer than phase, so writers often reach for the familiar spelling even when they mean “to unsettle.” Once you know that faze is about feelings and phase is about stages, the choice becomes clear.
At a Glance: Faze vs Phase
| Word | Meaning | Part of Speech | Common Use |
|---|---|---|---|
| faze | to disturb, unsettle, or worry someone | Verb | nothing fazes her, he wasn’t fazed |
| phase | a stage in a process; (verb) to introduce or remove in stages | Noun; also a verb | a difficult phase, phase out plastic, a phase of the moon |
Using “Faze”
Faze is a verb. It means to disturb, unsettle, frighten, or worry someone — usually so that they lose their calm or confidence. It is most often used in the negative, to say that something did not upset a person who stayed calm.
Definition
To disturb or disconcert someone; to make them feel uneasy or shaken: the criticism didn’t faze him at all. It is frequently used in negatives and questions: nothing seems to faze her; does the pressure faze you? The past tense and adjective form is fazed: she looked completely unfazed.
When to use it
- Saying something does not upset a calm person: nothing fazes her
- Describing someone who stays unshaken: he was completely unfazed
- Asking whether something worries someone: does the crowd faze you?
- Reporting that bad news disturbed someone: the result really fazed him
- Anywhere you mean “to unsettle” or “to put off” emotionally
The hostile questions from the audience didn’t faze her in the slightest.
Nothing seems to faze him; he stays calm under any pressure.
The young goalkeeper was completely unfazed by the huge crowd.
Losing the first set did not faze the experienced player.
Does speaking in public faze you, or are you confident?
nothing fazes + person: nothing fazes her
not / didn’t faze: it didn’t faze him
unfazed (adjective): she was completely unfazed
Using “Phase”
Phase is usually a noun. It means a distinct stage or period in a process of change or development. It can also be a verb, almost always in the phrasal verbs phase in (introduce gradually) and phase out (remove gradually).
Definition
1. (noun) A distinct stage in a series of events or a process of development: the first phase of the project; a difficult phase in her life. 2. (noun, science) One of the changing shapes of the moon, or a stage in a physical process: the phases of the moon. 3. (verb) phase in / phase out = to introduce or remove something gradually, in stages: they will phase out single-use plastics.
When to use it
- Describing a stage in a process: the next phase of the plan
- Describing a temporary period: it’s just a phase she’s going through
- Talking about the moon: the phases of the moon
- As the verb phase out: phase out diesel cars
- As the verb phase in: phase in the new rules slowly
The first phase of the building project will finish next spring.
He went through a difficult phase after leaving school.
The teacher explained the different phases of the moon.
The government plans to phase out single-use plastics by 2030.
The new safety rules will be phased in over the next two years.
the first / next phase of: the next phase of the plan
a difficult / passing phase: it’s just a phase
phase in / out (verb): phase out plastic, phase in the rules
The Key Difference: Unsettle vs a Stage
The single most important thing to remember is that faze and phase have nothing to do with each other in meaning — they just happen to sound the same. Faze is a verb about disturbing someone’s feelings. Phase is mostly a noun about a stage in a process. If you can replace the word with “unsettle” or “worry,” you want faze. If you can replace it with “a stage” or “a period,” you want phase.
Unsettle / worry → faze:
The setback didn’t faze her. (= it didn’t unsettle her)
A stage / a period → phase:
We have reached the final phase. (= the final stage)
Because they are homophones, no listener can hear the difference — the spelling only matters in writing. So when you write, pause and ask yourself: am I talking about disturbing someone, or about a stage? That one question solves almost every mistake.
Common Mistakes
The bad news didn’t phase me at all.
The bad news didn’t faze me at all. (= it didn’t unsettle me; this is the most common error)
Nothing phases her.
Nothing fazes her. (= nothing unsettles her)
We have reached the final faze of the project.
We have reached the final phase of the project. (= the final stage)
They will faze out the old machines next year.
They will phase out the old machines next year. (= remove them in stages)
Special Expressions and Fixed Phrases
Several common expressions are fixed with faze and cannot be spelled with phase:
- nothing fazes (someone) — they stay calm whatever happens: nothing fazes her
- not fazed / unfazed — not unsettled: he was completely unfazed
- didn’t faze (someone) — did not worry them: the noise didn’t faze him
And several are fixed with phase:
- a phase / a passing phase — a temporary period: it’s just a phase
- phase in / phase out — to introduce or remove in stages: phase out plastic
- the phases of the moon — the moon’s changing shapes
- the first / next / final phase — a stage of a plan or process
Faze uses the rare letter z — think of a sudden, jolting zap to your nerves that unsettles you. Phase begins with ph, just like the staged words physics and photosynthesis, which are full of stages and steps. If you can swap the word for “unsettle” or “worry,” choose faze; if you can swap it for “a stage” or “a period,” choose phase.
Frequently Asked Questions
Practice Faze vs Phase
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