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Index Plural Form: Rule, Examples, and Mistakes

The plural form of index is not as simple as adding an -s. In fact, index has two accepted plurals:…

Criterion Plural Form: Rule, Examples, and Mistakes
May 19, 2026
Analysis Plural Form: Rule, Examples, and Mistakes
May 18, 2026

Confusing Plurals

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Common Plural Forms

What Is the Plural of Matrix?

The plural of matrix is matrices (pronounced MAY-truh-seez) in formal, academic, and professional English. In less formal contexts, especially…

Common Plural Forms

What Is the Plural of Portfolio?

The plural of portfolio is portfolios. This is a regular plural form: you simply add an -s to the…

Common Plural Forms

What Is the Plural of Crisis?

The plural of crisis is crises. This follows the rule for many English nouns that end in -is, where…

Common Plural Forms

What Is the Plural of Basis?

The plural of basis is bases (pronounced BAY-seez). This is an irregular plural that changes the ending from -is…

Common Plural Forms

What Is the Plural of Memorandum?

If you have ever written a business memo or received an official note at work, you have likely encountered…

Common Plural Forms

What Is the Plural of Appendix?

The word appendix has two standard plural forms: appendices and appendixes. Both are correct, but they are used in…

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    About Me

    Miles Walsh is a seasoned business strategist and the founder of Business Plural Forms Corner, a niche platform dedicated to demystifying the intricacies of business entity structures. With over 15 years of hands-on experience in corporate law and entrepreneurship, Miles has meticulously tested and analyzed various plural business forms, from LLCs to S-Corps, ensuring his readers receive authoritative, data-driven advice.

    His expertise stems from direct involvement in founding multiple startups and consulting for Fortune 500 companies, where he specialized in optimizing business formation and compliance strategies. Miles is committed to E-E-A-T standards, regularly updating his content to reflect the latest regulatory changes.

    Contact: [email protected]

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      Common Mistakes with the Plural of Strategy

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      Common Mistakes with the Plural of Policy

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      Common Mistakes with the Plural of Tax

    • Confusing Plurals

      Common Mistakes with the Plural of Matrix

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Common Plural Forms
Common Plural Forms

What Is the Plural of Portfolio?

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Common Plural Forms
Common Plural Forms

What Is the Plural of Crisis?

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Common Plural Forms
Common Plural Forms

What Is the Plural of Basis?

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Common Plural Forms
Common Plural Forms

What Is the Plural of Memorandum?

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Common Plural Forms
Common Plural Forms

What Is the Plural of Appendix?

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Common Plural Forms

What Is the Plural of Index?

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  • About

    Business Plural Forms Corner is a focused English learning resource for business plural forms. The site is organized around Common Plural Forms, Singular or Plural Checks, Plural Spelling Rules, and Confusing Plurals, so readers can find the right kind of explanation without searching through unrelated topics. Each guide is designed to give a direct answer, practical examples, common mistake notes, and short practice support for real writing, email, study, or everyday conversation.

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      June 13, 2026
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      June 12, 2026
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