More so or Moreso: Which Is Correct?
Updated · Which One Is Correct editorial team
Quick answer: When choosing between more so or moreso, the correct choice is almost always the two-word version. Most style guides and professional writers recommend using more so as the standard form for emphasis. The single-word spelling moreso exists but is considered nonstandard and is generally avoided in formal writing. Understanding this distinction helps ensure your grammar remains clear and professional in any document.
The Short Answer
The standard and correct form is more so written as two distinct words. Style guides consistently recommend this two-word spelling over the alternative.
Confusion often arises because the phrase sounds exactly like a single word, leading some writers to merge them. Additionally, the word mores exists as a plural noun for customs, which can further cloud the distinction in the reader's mind.
Side-by-Side Comparison
| Form | Status | Use it when |
|---|---|---|
| more so | Standard | You want to emphasize a degree of comparison in a sentence |
| moreso | Nonstandard | Avoid this form in formal or professional writing contexts |
| mores | Noun | Use this when referring to the customs or habits of a society |
| more | Adverb/Adjective | Use this when comparing quantities or intensities without the 'so' emphasis |
Correct Example Sentences
- He was late, but she was more so.
- The second option is better, and the third is even more so.
- He was tired, but his brother was more so.
- Her explanation was clear, but his was more so.
- The task was difficult, but the second part was more so.
- She was angry, but her sister was more so.
- This path is long, but that one is more so.
- The movie was scary, but the sequel was more so.
- He was nervous, but his friend was more so.
- The room was messy, but the kitchen was more so.
Common Mistakes and Fixes
- The results were moreso expected than predicted.
- The results were more so expected than predicted.
- She was happy, but he was moreso.
- She was happy, but he was more so.
- I prefer the red shirt, but the blue one is moreso.
- I prefer the red shirt, but the blue one is more so.
- The plan was risky, and the backup was moreso.
- The plan was risky, and the backup was more so.
- They arrived early, but the neighbors were moreso.
- They arrived early, but the neighbors were more so.
- This book is interesting, but the sequel is moreso.
- This book is interesting, but the sequel is more so.
A Quick Test You Can Use
To verify the correct spelling, read the phrase aloud as if you are saying two distinct words rather than one fused sound. If the emphasis falls on the comparison between two degrees of the same quality, use the two-word version that separates the comparative element from the word so. This separation ensures the reader understands you are comparing intensity rather than using an invented term.
Related Word Pairs
- Its vs It is
- Use its for possession and it is for the subject and verb combination.
- Your vs You re
- Use your to show ownership and you re only when typing the words you are.
- Its vs It s
- Use its without a space for possession and it s with a space for the contraction.
- Then vs Than
- Use then for time sequence and than for comparisons between two things.
- Effect vs Affect
- Use effect as a noun for a result and affect as a verb to influence something.
Frequently Asked Questions
Is moreso ever correct to use?
While you might see the one-word spelling moreso in informal texting or casual internet comments, it is generally considered incorrect in standard English. Professional style guides recommend avoiding the merged form in favor of the two-word version more so to maintain clarity and adhere to established grammar rules.
Can I use moreso in a business email?
No, you should never use the one-word spelling in a business email or any professional document. The correct and standard form is more so with two distinct words. Using the nonstandard version may make your writing appear less polished or knowledgeable to your readers and colleagues.
Why do people spell it as one word?
People often combine the words because the phrase is frequently used together in speech, making it sound like a single unit. This habit leads to the common mistake of writing moreso, but written English requires us to separate the comparative word from the word so to show their individual grammatical roles clearly.
Does the word mores exist?
Yes, the word mores exists as a plural noun referring to the customary behaviors or social standards of a particular group or society. It is completely unrelated to the comparative phrase more so, so do not confuse the plural customs with the adverbial phrase used for comparison.
