loginvslupinWhich spelling fits?

Which to use

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

#15,212
“login” frequency rank
#34,579
“lupin” frequency rank
49791
confusion score

Side-by-Side Comparison

Feature login lupin
Definition Credentials: the combination of a user's identification and password used to enter a computer, program, network, etc. Any member of the genus Lupinus in the family Fabaceae.

Where the eye mixes login and lupin

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. login and lupin follow the identical consonant-vowel pattern (CVCVC). Same shape at a glance is often the real trap, independent of shared letters.

5 ch
login
5 ch
lupin

Visual trap between login and lupin

A purely visual mix-up. login (/ˈlɒɡ.ɪn/) and lupin (/ˈluːpɪn/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 49791, derived from the frequency rank of both members and their visual similarity.

login is recorded at frequency rank #15,212, classified as anoun, pronounced /ˈlɒɡ.ɪn/. lupin is at rank #34,579, tagged as anoun, pronounced /ˈluːpɪn/.

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 49791, this pair ranks #180,241 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of login vs lupin

Shared letters: iln. Private to "login": go. Private to "lupin": pu.

"login" · 5 letters · shape CVCVC  ·  "lupin" · 5 letters · shape CVCVC

Known mistypes of this pair

  • login ← lgoin · llogin · loggin · loginn · logni · loign · olgin
  • lupin ← llupin · lpuin · luipn · lupinn · lupni · luppin · ulpin

Frequently Asked Questions

Do "login" and "lupin" mean the same thing in a sentence?
No. They are said differently (/ˈlɒɡ.ɪn/ versus /ˈluːpɪn/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "login" or "lupin"?
"login" is the more common of the two: it sits at frequency rank #15,212 in our English list, against #34,579 for "lupin". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "login" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "lupin" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #180,241 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "login" and "lupin" also get mixed up with nearby pairs, the highest-scored neighbour is "Lucan vs lupin". 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 #180,241 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