weaklyvsweeklyWhich spelling fits?

Quick tell: weakly is a adjective, weekly is an adverb, so they fill different roles in a sentence.

Which to use

“weakly” is an adjective and “weekly” is an adverb - they look or sound alike but fill different roles in a sentence.

#23,432
“weakly” frequency rank
#2,653
“weekly” frequency rank
26085
confusion score

Side-by-Side Comparison

Feature weakly weekly
Definition Frail, sickly or of a delicate constitution; weak. Once every week.

Same sound, different letters: weakly vs weekly

Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 5 letters.

6 ch
weakly
6 ch
weekly

Ear matches; page differs - weakly and weekly

Say them out loud and nothing separates them: weakly and weekly carry the same recorded pronunciation, /ˈwiːkli/. Grammar is what tells them apart: one is anadjective, the other anadverb, so most sentences will only accept one of them. They differ by a single letter - a in “weakly” becomes e in “weekly”. Our composite confusion score for this pair is 26085, derived from the frequency rank of both members and their visual similarity.

weakly is recorded at frequency rank #23,432, classified as anadj, pronounced /ˈwiːkli/. weekly is at rank #2,653, tagged as anadv, pronounced /ˈwiːk.li/.

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 26085, this pair ranks #389,321 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of weakly vs weekly

Shared letters: eklwy. Private to "weakly": a. Private to "weekly": -.

"weakly" · 6 letters · shape CVVCCV  ·  "weekly" · 6 letters · shape CVVCCV

Known mistypes of this pair

  • weaklyewakly · waekly · weakkly · weaklly · weaklyy · weakyl · wealky · wekaly
  • weeklyewekly · weekkly · weeklly · weeklyy · weekyl · weelky · wekely · wekly

Frequently Asked Questions

Can "weakly" and "weekly" be used interchangeably?
No - they are not even the same part of speech. "weakly" is an adjective and "weekly" an adverb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "weakly" or "weekly"?
"weekly" is the more common of the two: it sits at frequency rank #2,653 in our English list, against #23,432 for "weakly". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

"weakly" and "weekly" share a sound, keep the gloss open, then jump to the headword or a nearby trap.

  • Full dictionary entry for "weakly" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "weekly" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #389,321 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "weakly" and "weekly" also get mixed up with nearby pairs, the highest-scored neighbour is "Wally vs weakly". 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 #389,321 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list