You’ve written a sentence, typed “analysis,” then paused — should that be “analyses” instead? If you’ve felt that flicker of doubt, you’re far from alone. This is one of the most common slip-ups in academic writing, business reports, and everyday English, and getting it wrong is often the first thing a careful reader notices.
The confusion isn’t really your fault. Both words come from Greek, and Greek plural patterns don’t follow the simple “add an -s” logic most English nouns use. Once you understand where this rule actually comes from, the difference becomes permanent knowledge instead of a guessing game.
Why This Mix-Up Happens More Than You’d Expect
English absorbed thousands of words from Greek and Latin, and many of them kept their original plural patterns instead of adopting standard English ones. “Analysis” is one of these inherited words, which means the usual “just add -s” instinct leads writers straight into an error.
Add to that the fact that “analysis” and “analyses” are pronounced almost identically when spoken quickly, and it’s easy to see why even experienced writers second-guess themselves.
Analysis: What It Means and When to Use It
“Analysis” refers to one detailed, focused examination of something — a single study, a single dataset, a single breakdown of information.
Typical examples:
- The financial analysis revealed an unexpected drop in revenue.
- Her analysis of the survey results changed the team’s strategy.
- A thorough analysis is required before the product launches.
You’ll see this singular form throughout research papers, business reports, scientific studies, and any context where one specific examination is being discussed.
Analyses: The Plural Form for Multiple Examinations
“Analyses” is simply the plural of “analysis.” Use it whenever you’re referring to more than one study, test, or evaluation.
Typical examples:
- The lab ran several analyses before confirming the results.
- Independent analyses from three universities reached the same conclusion.
- Their statistical analyses contradicted the original hypothesis.
This form shows up frequently in meta-research, comparative studies, and any writing that references multiple rounds of testing or evaluation.
The Greek Pattern Behind Analysis Becoming Analyses
A specific group of English nouns ending in “-is” switch to “-es” in their plural form. This isn’t random — it’s a direct carryover from Greek grammar.
| Singular | Plural |
| analysis | analyses |
| crisis | crises |
| thesis | theses |
| hypothesis | hypotheses |
| diagnosis | diagnoses |
| synthesis | syntheses |
Once you recognize this pattern, you can apply it instantly to any unfamiliar word that follows the same “-is” ending, instead of memorizing each case individually.
Why “Analysises” Is Never Correct English
A common instinct is to simply tack “-es” onto the existing word, producing “analysises.” This feels logical because most English plurals work that way — but words borrowed directly from Greek don’t follow that standard rule.
Incorrect: analysises Correct: analyses
A reliable shortcut: any time a word ends in “-is” and traces back to Greek origin, expect the plural to shift to “-es” rather than simply adding a letter.
Where the Word “Analysis” Actually Comes From
“Analysis” descends from the Greek word análysis, meaning to loosen, break apart, or release something into its components. The original Greek plural, analýseis, is the direct ancestor of the modern English “analyses.”
English didn’t invent a new plural rule here — it simply preserved the structure of the original language. That historical detail makes the irregular plural far easier to remember, because it isn’t arbitrary; it’s inherited.
Other English Words That Follow This Same Inherited Pattern
Several academic and scientific terms borrowed from Greek or Latin follow comparable irregular plural rules.
| Pattern | Singular | Plural |
| -is to -es | basis | bases |
| -on to -a | phenomenon | phenomena |
| -um to -a | datum | data |
| -a to -ae | formula | formulae |
| -us to -i | cactus | cacti |
Recognizing this broader family of words helps you avoid similar plural mistakes well beyond just “analysis.”
Does British English Use a Different Rule?
No. Unlike many word pairs that shift spelling or usage between American and British English, “analysis” and “analyses” behave identically in both. The spelling, the meaning, and the underlying grammar rule remain consistent everywhere English is written.
How to Pronounce Analysis and Analyses Correctly
Mispronouncing these words is almost as common as misspelling them, since the difference comes down to a single sound at the end.
| Word | Pronunciation | Sounds Like |
| analysis (singular noun) | /əˈnæl.ə.sɪs/ | uh-NAL-uh-sis |
| analyses (plural noun) | /əˈnæl.əˌsiːz/ | uh-NAL-uh-seez |
| analyses (verb form of “analyze”) | /əˈnæl.əˌsaɪz/ | uh-NAL-uh-syz |
Notice the plural noun ends with a long “ee” sound, while the verb form (used mainly in British spelling, as in “she analyses the data”) ends with a long “eye” sound. Context almost always makes the correct meaning obvious.
Real Examples: Wrong vs Right Usage
| Situation | Incorrect | Correct |
| Research summary | The analyses shows a clear trend. | The analysis shows a clear trend. |
| Lab report | We ran several analysis on the samples. | We ran several analyses on the samples. |
| Business writing | Our analysis were reviewed by the board. | Our analysis was reviewed by the board. |
| Academic paper | The analysises were inconclusive. | The analyses were inconclusive. |
| Casual writing | Let’s do an analyses of the situation. | Let’s do an analysis of the situation. |
Common Mistakes Writers Make (And How to Fix Each One)
- Treating “analyses” as singular — Incorrect: The analyses shows promise. Correct: The analysis shows promise.
- Using “analysis” when referring to multiple studies — Incorrect: We completed three analysis. Correct: We completed three analyses.
- Forming the plural by simply adding “-es” to the full word — Incorrect: analysises. Correct: analyses.
- Mixing up the noun and verb forms — remember that “analyses” as a verb (British spelling) pairs with a singular subject, such as “the software analyses the data.”
- Ignoring subject-verb agreement — singular “analysis” pairs with “was” or “shows,” while plural “analyses” pairs with “were” or “show.”
A Simple Trick to Lock This In Permanently
Picture the word splitting apart: one “analysis” branches into many “analyses,” the same way the Greek root originally meant breaking something into separate parts. Whenever you’re unsure, ask yourself: am I describing one breakdown, or several? One always stays “analysis.” More than one always becomes “analyses.”
The One Rule That Settles This for Good
Use “analysis” for a single, individual examination. Use “analyses” for two or more examinations, studies, or evaluations. Never form the plural by simply adding “-es” to the full word “analysis” — the Greek-derived plural replaces “-is” with “-es” instead.
FAQs
What’s the actual difference between analysis and analyses?
Analysis refers to one examination or study, while analyses refers to two or more.
Why isn’t the plural just “analysises”?
Because the word comes from Greek, where “-is” endings shift to “-es” in plural form rather than simply adding a letter.
Is “analyses” only used as a noun?
No, it’s also the verb form of “analyze” in British English, as in “he analyses the report weekly.”
How do I pronounce the plural form correctly?
“Analyses” as a plural noun ends with a long “ee” sound, pronounced uh-NAL-uh-seez.
Does British English treat these words differently from American English?
No, both spelling and usage stay identical across American and British English.
What’s a quick way to check which form to use?
Ask if you’re referring to one study or several. One stays “analysis,” more than one becomes “analyses.”
Final Thoughts
The difference between “analysis” and “analyses” isn’t a random English quirk — it’s a small piece of Greek grammar that survived intact. Once that connection clicks, you’ll stop guessing and start applying the rule automatically, whether you’re writing a research paper, a business report, or a quick email.
see also: “Knaw” or “Gnaw”? The One Spelling Rule You Need to Know
Liam Johnson is a dedicated language expert with 4 years of professional experience. He specializes in Grammar, Vocabulary, and Sentence structure.
