laggingvslastingWhich spelling fits?

Which to use

“lagging” and “lasting” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#22,134
“lagging” frequency rank
#5,979
“lasting” frequency rank
28113
confusion score

Side-by-Side Comparison

Feature lagging lasting
Definition falling behind, not keeping up the pace Persisting for an extended period of time.

Letter map: lagging vs lasting

Shared letters muted; letters that set lagging and lasting apart highlighted. Shared run: 5.

7 ch
lagging
7 ch
lasting

Corpus notes: lagging and lasting

lagging and lasting 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 share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 28113, derived from the frequency rank of both members and their visual similarity.

lagging is recorded at frequency rank #22,134, classified as anadj. lasting is at rank #5,979, tagged as anadj, pronounced /ˈlɑːstɪŋ/.

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 28113, this pair ranks #373,623 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of lagging vs lasting

Shared letters: agiln. Private to "lagging": -. Private to "lasting": st.

"lagging" · 7 letters · shape CVCCVCC  ·  "lasting" · 7 letters · shape CVCCVCC

Known mistypes of this pair

  • laggingalgging · laggign · laggingg · lagginng · laggnig · lagigng · laging · lgaging
  • lastingalsting · lasitng · lassting · lastign · lastingg · lastinng · lastnig · lastting

Frequently Asked Questions

Can "lagging" and "lasting" be used interchangeably?
No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
In ordinary English text, does "lagging" or "lasting" show up more?
"lasting" is the more common of the two: it sits at frequency rank #5,979 in our English list, against #22,134 for "lagging". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "lagging" and "lasting".

  • Full dictionary entry for "lagging" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "lasting" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #373,623 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "lagging" and "lasting" also get mixed up with nearby pairs, the highest-scored neighbour is "lagging vs lugging". 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 #373,623 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