Which to use
“NSF” is a name and “NSFW” is an adjective - they look or sound alike but fill different roles in a sentence.
- #27,233
- “NSF” frequency rank
- #12,818
- “NSFW” frequency rank
- 40051
- confusion score
Side-by-Side Comparison
| Feature | NSF | NSFW |
|---|---|---|
| Definition | Initialism of National Science Foundation. | Initialism of not safe for work; i.e., containing inappropriate or adult content (e.g. pornography or profanity) that may be unsuitable for public, formal or controlled environments, such as at work. |
Where the spellings diverge
Shared letters are muted; the letters that actually set NSF and NSFW apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: NSF is aname and NSFWanadjective. On the page they differ by 1 extra letter(s) - “NSF” sits inside “NSFW”. Our composite confusion score for this pair is 40051, derived from the frequency rank of both members and their visual similarity.
NSF is recorded at frequency rank #27,233, classified as aname. NSFW is at rank #12,818, tagged as anadj.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 40051, this pair ranks #271,119 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of NSF vs NSFW
Shared letters: fns. Private to "NSF": -. Private to "NSFW": w.
"NSF" · 3 letters · shape CCC · "NSFW" · 4 letters · shape CCCC
Known mistypes of this pair
- NSFW ← nfsw · nnsfw · nsffw · nsfww · nssfw · nswf · snfw
Frequency comparison
Frequently Asked Questions
Can "NSF" and "NSFW" be used interchangeably?
Which is more common, "NSF" or "NSFW"?
Remembering NSF vs NSFW
The fastest way to pick the right one every time.
- Check the role first: if you need a name, it's “NSF”; for an adjective, it's “NSFW”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “NSF” entry
- Browse more pairs most likely to be confused. Most confusable