English UsageGrammar guide

Plural of Corps

“Corps” has an invariant written plural: one corps, two corps. In American dictionary treatment, the plural can also be distinguished in pronunciation. The spelling itself does not change.

Quick answer

The plural of “corps” is also spelled “corps.” Context shows whether the noun is singular or plural.

Key details

Confusion Familyinvariant plural
Rule Familyzero plural with pronunciation boundary
Termscorps
Variant ScopeThis page explains number and pronunciation only; it does not describe military organization structures.

Choose the right form

Decision table for Plural of Corps
Meaning / situationForm / constructionDecision
one group/unitcorpsSingular spelling.
two or more groups/unitscorpsPlural spelling is unchanged.
American pronunciationplural may be pronounced differentlyPronunciation can mark number.

Quick tests

Plural-choice test

Are you referring to more than one corps?

If yes: Keep the spelling “corps”; use context and agreement to show plurality.

If no: Keep singular “corps.”

Caveat: Pronunciation varies by number in the cited American treatment; spelling does not.

Examples

Example

Two corps were assigned to the exercise.

The plural spelling remains “corps.”

Example

A corps was formed for the project.

The singular has the same spelling.

Example

Several diplomatic corps were represented.

Context supplies plural number.

Further guidance

Core difference

Use the spelling “corps” for both singular and plural.

Fast Test

Look to determiners, numbers, and agreement: “a corps” versus “two corps.”

Usage Boundary

Do not add a written -s to form the ordinary plural.

Sources and evidence

Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.

  1. CORPS | English meaning - Cambridge Dictionary (opens in a new tab)Cambridge University Press · Cambridge gives corps as both singular and plural, with plural pronunciation distinguished in its American dictionary treatment.

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