Grammarflex

Grammarflex logo

What’s the Plural of Thesis? (Thesises? Theses?)

  • November 13, 2022

plural with thesis

What’s the plural of “thesis”?

Thesis , (and its plural theses ) is an example of one of the many common English words that has roots elsewhere. In this case, thesis is a word that has roots all the way back to Ancient Greek. Like other similarly structured words: diagnosis , synthesis , analysis , oasis , crisis , nemesis and the like, thesis is by no means the only frequently used Greek word that’s made it to Modern English.

What’s the singular of thesis?

"Thesis" singular in sentences.

Thesis is a singular noun and refers to one thing (or one thesis ).

What’s a thesis?

Merriam-Webster defines the noun thesis (plural theses ) as follows, “a dissertation embodying results of original research and especially substantiating a specific view especially : one written by a candidate for an academic degree.”

plural with thesis

Nouns that end in -sis/ses

Thesis is an irregular plural noun that does not end in the typical -s / -es that regular plural noun forms take. This is so despite that theses plural does in fact end in the conventional -s/-es suffix. Why is it still considered irregular; then, given that it follows the regular plural form? Notice the following regular plural noun forms:

plural with thesis

Thesis / theses operates differently. With these Greek words, the -ses does not simply  add onto the end of the singular form of the noun; instead, -ses replaces the singular noun’s suffixes, and effectively changes the entire spelling of the word (and arguably the word itself.)

Examples of “thesis” (singular) in sentences

His master thesis was on modal neural networks.
She wrote her thesis on Renaissance Nativity scenes.
We disagreed with the basic thesis of the report.
I’ve made a first draft of my thesis .
The student’s experiments helped her formulate a thesis to share with her professor and classmates.

Examples of “theses” (plural) in sentences

It must not be assumed that Luther’s ninety-five theses produced any considerable direct results.
The collection of theses are ready for publication.
Twenty years after Savonarola’s death Martin Luther made public his theses against indulgences.
Theses are generally examined by two or more specialists.
Theses is the plural form of the singular noun thesis.

Origin of the word “thesis”

Thesis / theses are of Greek origin.

Read about other irregular nouns

  • What’s the plural of bison?
  • What’s the plural of moose?
  • What’s the plural of sheep?
  • What’s the plural of ox?
  • What’s the plural of cactus?
  • What’s the plural of crisis?
  • What’s the plural of hypothesis?

Read about other topics in grammar

  • What’re personal pronouns?
  • What’s the difference between they’re, their, and there?
  • Whose vs who’s?
  • Merriam-Webster, thesis/theses.

Recent Posts

Nerve-racking or nerve-wracking?

Is it Nerve-Racking, Nerve-Wrecking or Nerve-Wracking?

Which is correct: nerve-wracking or nerve-racking? To describe something as extremely irritating, annoying, or trying; (as in, a nerve-racking day; or a nerve-racking noise), we

Beck and call or beckon call?

“Beck and Call” or “Beckon Call”? Which is Correct?

Meaning of ‘beck and call’ ‘To be at someone’s beck and call‘ is an idiomatic expression that describes being immediately available, or ready to be

What does connotation mean?

What’s the Meaning of the Word “Connotation”?

Ever catch bad vibes from a text? Any feeling or internal response you have from the actual words used to is its connotation; which perhaps

Ambiguous vs. Ambivalent

What’s the Difference Between Ambiguous & Ambivalent?

Are ambiguous and ambivalent the same? Something ambiguous (an adjective) is unclear, vague and open to different interpretations. To be ambivalent (also an adjective) means

When to use have or had?

When to Use Have or Had? (Explained with Examples)

When should you use “have” or “had”? When is it correct to use have, has, or had? Phrased differently, what’s the past tense of have?

The past participle

What’s the Past Participle? (Explanation & Usage)

The past participle is a form of a verb that can appear as an adjective, or be used to form specific tenses and the passive

Emigrate or immigrate?

Emigrate vs. Immigrate (Meaning + Examples)

Meaning of emigrate vs. immigrate To immigrate is the verb form of the noun immigrant; referring to someone that’s moved away from their birth country

Recurring or reoccurring?

Recurring vs. Reoccurring (Correct Usage, + Examples)

Did you have a recurring or reoccurring dream? If you’re finding the difference between these two words befuddling, then this post is for you. How

Nevertheless vs. nonetheless

What’s the Difference Between Nevertheless vs. Nonetheless?

Nevertheless vs. nonetheless Nevertheless and nonetheless are synonyms that both belong to the same part of speech; i.e, they’re compound adverbs that express contrast. There

IMAGES

  1. Plural of Thesis: A Quick Guide for English Learners

    plural with thesis

  2. plural of Thesis

    plural with thesis

  3. What's the Plural of Thesis? (Thesises? Theses?)

    plural with thesis

  4. Whats the Plural of Thesis: Understanding Singular and Plural Forms

    plural with thesis

  5. The Plural of Thesis

    plural with thesis

  6. WHAT IS A THESIS? noun, plural the·ses1.a proposition stated or put

    plural with thesis