Which to use
“ASTM” and “Astor” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #31,068
- “ASTM” frequency rank
- #31,069
- “Astor” frequency rank
- 62137
- confusion score
Side-by-Side Comparison
| Feature | ASTM | Astor |
|---|---|---|
| Definition | Initialism of American Society for Testing and Materials; former name of ASTM International. | A surname. |
Letter map: ASTM vs Astor
Shared letters muted; letters that set ASTM and Astor apart highlighted. Shared run: 3. ASTM runs 4 letters (VCCC) against Astor's 5 (VCCVC) - the length gap alone is often enough to separate them once you know to check it.
Corpus notes: ASTM and Astor
ASTM and Astor are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 62137, derived from the frequency rank of both members and their visual similarity.
ASTM is recorded at frequency rank #31,068, classified as aname. Astor is at rank #31,069, tagged as aname.
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 62137, this pair ranks #90,194 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of ASTM vs Astor
Shared letters: ast. Private to "ASTM": m. Private to "Astor": or.
"ASTM" · 4 letters · shape VCCC · "Astor" · 5 letters · shape VCCVC
Known mistypes of this pair
Frequently Asked Questions
Can "ASTM" and "Astor" be used interchangeably?
Frequency check: "ASTM" vs "Astor" - which ranks higher?
After this comparison
You've compared "ASTM" and "Astor". Here's where to go from here.
- Full dictionary entry for "ASTM" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Astor" - compare definitions side by side with the headword page. Word entry
- This pair ranks #90,194 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "ASTM" and "Astor" also get mixed up with nearby pairs, the highest-scored neighbour is "Asta vs Astor". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #90,194 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.