The Grammar GuideSpellingWhat is the difference between 'bases' and 'basis'?

What is the difference between 'bases' and 'basis'?

What is the difference between 'bases' and 'basis'?

The words bases and basis are often confused because they are easy to mistype. In this article, we explain the difference between them.

Basis means a starting point, base or foundation for an argument or hypothesis when used as a noun.

Bases means foundations or starting points, checkpoints when used as a noun.

A good way to remember the difference is Bases is the plural of base.

Out of the two words, 'basis' is the most common. It appears about seven times more frequently than 'bases'.



Bases and basis are easy to confuse because they are homophones. Here's the difference:

Bases is the plural form of the noun "base." It means "a foundation or groundwork." It can also be the third-person singular present form of the verb "to base." As a verb, it means "establishes or lays a foundation."

Basis is a noun that means "a fundemental principle or a basic unit."

Cofusingly, bases is also the plural form of basis.

Should I use 'the bases of the' or 'the basis of the'?

The right expression is 'the bases of the'. These phrases are often confused because of their similar spelling.

What's the correct phrase 'acrylic resin denture bases' or 'acrylic resin denture basis'?

The correct expression is 'acrylic resin denture bases'. These phrases are often confused because they have a similar spelling.

Is the correct phrase 'of the bases of' or 'of the basis of'?

The correct phrase is 'of the bases of'. These phrases are often confused because of their similar spelling.

Should I use 'at the bases of' or 'at the basis of'?

The correct expression is 'at the bases of'. These phrases are often confused because they appear similar.

Is the right expression 'Royal Air Force bases' or 'Royal Air Force basis'?

The right phrase is 'Royal Air Force bases'. These phrases are often confused because they have a similar spelling.

Which is correct 'on the basis of' or 'on the bases of'?

You should use 'on the basis of'. These phrases are often confused because they are easy to mistype.

Is the correct phrase 'the basis of the' or 'the bases of the'?

The right expression is 'the basis of the'. These phrases are often confused because they look similar.

Which is correct 'On the basis of' or 'On the bases of'?

The right phrase is 'On the basis of'. These phrases are often confused because they are easy to mistype.

Is the expression 'the basis of a' or 'the bases of a'?

The correct phrase is 'the basis of a'. These phrases are often confused because they are easy to mistype.

Should I use ', on the basis' or ', on the bases'?

The correct phrase is ', on the basis'. These phrases are often confused because they have a similar spelling.

Some synonyms of bases are: component part, principles, supports, cores, base.

Some synonyms of basis are: reason, foundation, root, base, supposal.

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The definitions in this article were adapted from Wiktionary and dictionary.com.

Dictionary Definition of basesDictionary Definition of basis

Examples of bases in a sentence

Usually, campaigns establish regional offices in Iowa that the staff can use as bases.
- The audacity to win: the inside story and lessons of Barack Obama's historic victory by David Plouffe
At either side were small night tables that held matching rose-shaded lamps with ebony bases.
- Man on the run by Charles Williams
The first ordeal ended only upon arrival at the rebel bases, where the survivors were reshaped.
- The Gun by C. J. Chivers
He delivers meat to all the German bases.
- Jackdaws by Ken Follett
This guy had pulled out all the stops and hit all the bases.
- The long road home by Danielle Steel

Examples of basis in a sentence

But they seemed to be, at least on a limited basis.
- Touch of Darkness by C. T. Adams; Cathy Clamp
She tried to beat me to a pulp on a regular basis.
- The Battle of the Labyrinth by Rick Riordan
In my business, people usually operate on a need-to-know basis.
- Beyond belief by Roy Johansen
It's the basis of female psychology.'
- The shadow of the wind by Carlos Ruiz Zafón; Lucía Graves
Anyhow, I always thought you and the Eel were doing it on a daily basis, more or less.”
- A Dark Matter by Peter Straub
Test yourself

Choose the missing word in each question.

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