Quick answer: Enormousness simply means great size or extent, with no moral judgement: The enormousness of the stadium impressed the visitors. Enormity, in traditional and careful usage, refers to the extreme scale of something serious, shocking, or morally wrong: The enormity of the crime shocked the nation. Many people now use enormity loosely to mean "great size", but style guides recommend enormousness for that neutral meaning. For a fuller definition, see the Cambridge Dictionary entry for ‘enormity’.

Comparison Table

WordPart of SpeechMeaningExample
enormitynountraditionally: the extreme scale of something serious, shocking, or wickedThe enormity of the atrocity is hard to comprehend.
enormousnessnoungreat size or extent; a neutral description of physical or abstract scaleThe enormousness of the task overwhelmed the new intern.

Using Enormity

Enormity traditionally describes the extreme scale of something serious, terrible, or morally significant — not simply physical size. Careful writers reserve it for grave or shocking situations.

The enormity of the genocide is difficult to put into words.

She slowly grasped the enormity of her mistake.

The court recognised the enormity of the fraud committed.

The enormity of the disaster prompted a global relief effort.

Using Enormousness

Enormousness is the more neutral, straightforward noun for great size, quantity, or extent, without any implication of wrongdoing.

The enormousness of the desert stretched as far as the eye could see.

Visitors were struck by the enormousness of the cathedral.

She was daunted by the sheer enormousness of the project.

The enormousness of the universe is almost impossible to imagine.

Memory Trick

EnormITY often pairs with something morally wrong — think "atrocity", which also ends in -ity and describes something terrible. EnormousNESS simply adds the plain "-ness" ending, like "bigness" — a neutral description of size.

Common Mistakes

Mistake 1 — Using enormity to mean simply "great size"

We were amazed by the enormity of the new shopping mall.
We were amazed by the enormousness of the new shopping mall.
Many people do use enormity this way informally, but careful style guides reserve it for serious or shocking situations.

Mistake 2 — Using enormousness for a moral scale of wrongdoing

He finally understood the enormousness of the betrayal.
He finally understood the enormity of the betrayal.

Tips to Avoid Confusion

  • If describing the scale of something wrong, shocking, or morally serious, traditional style prefers enormity.
  • If describing plain physical or abstract size, the safer neutral word is enormousness.
  • Be aware that many speakers and even some dictionaries now accept enormity for "great size" too — but in formal or academic writing, keep the distinction.
  • When unsure, enormousness never risks sounding like you're describing something as morally wrong.

For more on related grammar, see nominalisation. Also confusing: Amount vs Number, Altogether vs All Together, Ability vs Capability. Browse all confusing word pairs →

Quick Check: Enormity or Enormousness?

4 fill-in-the-blank questions — choose the correct word for each sentence.

1. “The judge condemned the ___ of the crime.” (moral scale)

2. “The ___ of the mountain range left us speechless.” (size)

3. “It took years for the enormity families to grasp the ___ of the betrayal.”

4. “The ___ of the library’s collection amazed every visitor.”

Frequently Asked Questions

What is the difference between enormity and enormousness?

Enormity traditionally refers to the extreme scale of something serious, shocking, or morally wrong: "the enormity of the crime." Enormousness simply describes great size or extent, without moral judgement: "the enormousness of the stadium." Modern usage sometimes blurs this distinction, but careful writers keep it.

Is it acceptable to use enormity to mean 'great size'?

It has become common, especially in casual usage and journalism, and many modern dictionaries now list it as an accepted meaning. However, traditional style guides and formal academic writing still recommend enormousness for neutral size and reserve enormity for serious wrongdoing.

Why do style guides object to using enormity for size?

Enormity's traditional meaning relates to 'enormous' in the sense of a serious deviation from what is right — i.e. atrocity or outrage. Style guides argue that using it simply for size dilutes this precise, morally-loaded meaning.

What are synonyms for enormity in its traditional sense?

Synonyms include atrocity, outrage, monstrousness, and depravity — all relating to serious wrongdoing, not neutral size. This confirms that enormity's traditional core meaning is about moral seriousness.

What are synonyms for enormousness?

Synonyms include vastness, immensity, hugeness, and magnitude (in the sense of size). These are all neutral terms describing scale without moral connotation.

Can enormity be used in a positive context?

Rarely — enormity is almost always used in serious, negative, or shocking contexts (crimes, disasters, tragedies). It is not typically used to describe something impressively large in a positive or neutral sense; for that, use enormousness or immensity.

What is the adjective these nouns come from?

Both come from the adjective 'enormous', meaning very large. Enormousness is the straightforward noun form describing size; enormity historically diverged to carry the additional, stronger sense of moral or shocking scale.

Which word is safer to use in an academic essay?

In formal academic writing, enormousness is the safer choice for describing neutral size or scale, since it avoids any risk of unintentionally implying that something is morally wrong or shocking, which enormity can suggest.

Give an example sentence using both words correctly.

"Standing before the cathedral, she was struck by its sheer enormousness; only later, reading of the massacre once committed there, did she grasp the enormity of that history." This shows enormousness for physical size and enormity for moral seriousness.

How can I remember enormity vs enormousness?

Link enormity to 'atrocity' — both end in '-ity' and describe something seriously wrong. Link enormousness to plain 'bigness' — both simply add '-ness' to describe scale, with no moral judgement implied.