Which to use
“sickly” and “sucky” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #28,018
- “sickly” frequency rank
- #46,799
- “sucky” frequency rank
- 74817
- confusion score
Side-by-Side Comparison
| Feature | sickly | sucky |
|---|---|---|
| Definition | Frequently ill or in poor health; weakly. | Being something which sucks, which is unpleasant or inferior. |
Where the eye mixes sickly and sucky
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. sickly runs 6 letters (CVCCCV) against sucky's 5 (CVCCV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: sickly vs sucky
A purely visual mix-up. sickly (/ˈsɪkli/) and sucky (/ˈsʌki/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 74817, derived from the frequency rank of both members and their visual similarity.
sickly is recorded at frequency rank #28,018, classified as anadj, pronounced /ˈsɪkli/. sucky is at rank #46,799, tagged as anadj, pronounced /ˈsʌki/.
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 74817, this pair ranks #35,133 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of sickly vs sucky
Shared letters: cksy. Private to "sickly": il. Private to "sucky": u.
"sickly" · 6 letters · shape CVCCCV · "sucky" · 5 letters · shape CVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "sickly" for "sucky" ever safe?
Which is more common, "sickly" or "sucky"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "sickly" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sucky" - compare definitions side by side with the headword page. Word entry
- This pair ranks #35,133 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sickly" and "sucky" also get mixed up with nearby pairs, the highest-scored neighbour is "sucky vs surry". 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 #35,133 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.