No good vs Poor

When to use each in English, with meaning, register, and examples.

No good

InformalTop 3,000 (common)

Poor

Top 1,000 (very common)A1
Most formal: PoorMost common: Poor
 No goodPoor
Pronunciation🇬🇧 //nəʊ ɡʊd//🇺🇸 //noʊ ɡʊd//🇬🇧 /["/pɔː(r)//pʊə(r)/"]/🇺🇸 /["/pʊr//pɔːr/"]/
MeaningNot acceptable or useful.Having little money or resources
ExampleThis plan is no good; we need to rethink it.She is in a poor condition after the accident.
RegisterInformalNeutral
How commonTop 3,000 (common)Top 1,000 (very common)
CEFR level-A1
Collocationsno good at all, no good for something, feel no good, it's no good, no good reasonpoor health, poor quality, poor performance
Antonyms-rich, wealthy, affluent
Common mistakesOverusing it in formal writing or speech., 'No good' mistaken for 'not good', which is more common., Using it without context, making the meaning unclear.Confused with 'pore' (the skin opening), Using 'poor' as a noun (should use 'the poor'), Saying 'poorness', which is not standard
Usage notesTypically used to express dissatisfaction or disapproval. It's informal and may not be suitable in formal settings.Use 'poor' to describe someone lacking money or in bad conditions. Avoid using it in formal reports where 'underprivileged' might be more suitable.

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No good
Poor

Frequently asked questions: No good vs Poor

What's the difference between No good and Poor?

No good: Not acceptable or useful. Poor: Having little money or resources

Which is more formal: No good and Poor?

Poor is the most formal of these.

Which is more common: No good and Poor?

Poor is the most common in everyday English.

Can you show an example of each?

No good: This plan is no good; we need to rethink it. Poor: She is in a poor condition after the accident.

Can I use No good and Poor interchangeably?

Not always. No good and Poor 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.

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