Cool MateMainly vs Mostly
When to use each in English, with meaning, register, and examples.
Mainly
Top 2,000 (common)B1adverb
Mostly
Top 1,000 (very common)A2adverb
Most common: Mostly
| Mainly | Mostly | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈmeɪnli/"]/🇺🇸 /["/ˈmeɪnli/"]/ | 🇬🇧 /["/ˈməʊstli/"]/🇺🇸 /["/ˈməʊstli/"]/ |
| Meaning | mostly or for the most part | mainly or for the most part |
| Example | She mainly works from home to achieve a better work-life balance. | The sauce is mostly cream. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | B1 | A2 |
| Part of speech | adverb | adverb |
| Collocations | mainly for, mainly because, mainly concerned, mainly composed, mainly focused | mostly true, mostly harmless, mostly used, mostly ignored, mostly finished |
| Antonyms | rarely, seldom, occasionally | rarely, seldom, never |
| Common mistakes | Using 'mainly' instead of 'main' as an adjective, Confusing 'mainly' with 'mainly' as a conjunction, Placing 'mainly' at the beginning of the sentence incorrectly | Using 'mostly' instead of 'most' when comparing amounts., Confusing 'mostly' with 'mostly not' to communicate disagreement., Using 'mostly' in place of 'generally' or 'usually' without appropriate context. |
| Usage notes | Use 'mainly' in sentences to indicate the primary focus or majority aspect. It fits well in formal and informal contexts but avoid it in casual speech where shorter alternatives may suffice. | Used to describe something that is true for the majority or the largest part. Suitable in both spoken and written contexts, but avoid using in highly technical or specialized discussions. |
Frequently asked questions: Mainly vs Mostly
What's the difference between Mainly and Mostly?
Mainly: mostly or for the most part Mostly: mainly or for the most part
Which is more common: Mainly and Mostly?
Mostly is the most common in everyday English.
Which is more advanced: Mainly and Mostly?
Mainly is the highest level, at B1, on the CEFR scale.
Are Mainly and Mostly the same CEFR level?
Mainly: B1, Mostly: A2 on the CEFR scale.
What part of speech are Mainly and Mostly?
Mainly: adverb, Mostly: adverb.
Can you show an example of each?
Mainly: She mainly works from home to achieve a better work-life balance. Mostly: The sauce is mostly cream.
Can I use Mainly and Mostly interchangeably?
Not always. Mainly and Mostly are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.