Which to use
“formulae” is a noun and “formulate” is a verb - they look or sound alike but fill different roles in a sentence.
- #38,402
- “formulae” frequency rank
- #21,519
- “formulate” frequency rank
- 59921
- confusion score
Side-by-Side Comparison
| Feature | formulae | formulate |
|---|---|---|
| Definition | plural of formula | To put into a clear and definite form of statement or expression. |
Where the eye mixes formulae and formulate
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence.
Visual trap between formulae and formulate
These two trip readers on the page rather than in the ear: formulae is /ˈfɔː(ɹ).mjə.li/ while formulate is /ˈfɔː(ɹ)mjʊleɪt/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 59921, derived from the frequency rank of both members and their visual similarity.
formulae is recorded at frequency rank #38,402, classified as anoun, pronounced /ˈfɔː(ɹ).mjə.li/. formulate is at rank #21,519, tagged as averb, pronounced /ˈfɔː(ɹ)mjʊleɪt/.
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 59921, this pair ranks #103,287 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of formulae vs formulate
Shared letters: aeflmoru. Private to "formulae": -. Private to "formulate": t.
"formulae" · 8 letters · shape CVCCVCVV · "formulate" · 9 letters · shape CVCCVCVCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "formulae" for "formulate" ever safe?
Frequency check: "formulae" vs "formulate" - which ranks higher?
Useful next steps
Eye-level mix-up between "formulae" and "formulate" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "formulae" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "formulate" - compare definitions side by side with the headword page. Word entry
- This pair ranks #103,287 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "formulae" and "formulate" also get mixed up with nearby pairs, the highest-scored neighbour is "formulae vs formulaic". 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 #103,287 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.