Plural of Thesis
The Quick AnswerThe plural of thesis is theses.
The Plural of ThesisThe plural of thesis is theses.
- PhD theses are usually over two hundred pages.
- Copyright permission from the author is required before theses can be digitised.
Are You Good at Plurals?Here's a quick test.
The Standard Rules for Forming the PluralsThe table below shows the standard rules for forming the plurals of nouns in English.
|Type||Example of Type||Forming the Plural||Plural|
|Most Nouns|| lamp
|add s|| lamps
|Noun Ending s, sh, ch, x or z|| box
|add es|| boxes
|Nouns ending [consonant] o||
|add either s or es
(There are no rules for this - you have to know.)
|Nouns ending [vowel] o|| patio
|add s|| patios
|Nouns ending [consonant] y|| story
|change the y to an i and add es|| stories
|Nouns ending [vowel] y|| donkey
|add s|| donkeys
|Nouns ending f or fe|| dwarf
|ves and/or s
(There are no rules - you have to know.)
hooves or hoofs
|Nouns ending is|| thesis
|change the is to es|| theses
|some nouns undergo a vowel or letters change|| men
|More exceptions|| salmon
|some nouns do not change at all|| salmon
|Foreign rulings|| fungus
|some nouns adopt foreign rulings|| fungi
Why Is There Confusion over the Plural of Thesis?Theses is the only way to make the noun thesis plural.
Confusion arises because some mistakenly believe that all nouns ending in s should form a plural that adds es to the end of the word. When a noun ends with is, you need to replace the is with an es to form the plural. This is because its plural form derives from Greek.