fungivsfungusWhich spelling fits?

Which to use

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

#15,414
“fungi” frequency rank
#14,329
“fungus” frequency rank
29743
confusion score

Side-by-Side Comparison

Feature fungi fungus
Definition Spongy, abnormal growth, as granulation tissue formed in a wound. Any member of the kingdom Fungi; a eukaryotic organism typically having chitin cell walls but no chlorophyll or plastids. Fungi may be unicellular or multicellular.

Where the eye mixes fungi and fungus

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. fungi runs 5 letters (CVCCV) against fungus's 6 (CVCCVC) - the length gap alone is often enough to separate them once you know to check it.

5 ch
fungi
6 ch
fungus

Look-alike desk: fungi vs fungus

A purely visual mix-up. fungi (/ˈfʌnd͡ʒaɪ/) and fungus (/ˈfʌŋ.ɡəs/) 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 29743, derived from the frequency rank of both members and their visual similarity.

fungi is recorded at frequency rank #15,414, classified as anoun, pronounced /ˈfʌnd͡ʒaɪ/. fungus is at rank #14,329, tagged as anoun, pronounced /ˈfʌŋ.ɡəs/.

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 29743, this pair ranks #360,430 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of fungi vs fungus

Shared letters: fgnu. Private to "fungi": i. Private to "fungus": s.

"fungi" · 5 letters · shape CVCCV  ·  "fungus" · 6 letters · shape CVCCVC

Known mistypes of this pair

  • fungi ← ffungi · fnugi · fugni · funggi · funig · funngi · ufngi
  • fungus ← ffungus · fnugus · fugnus · funggus · fungsu · funguss · funngus · funugs

Frequently Asked Questions

Is swapping "fungi" for "fungus" ever safe?
No. They are said differently (/ˈfʌnd͡ʒaɪ/ versus /ˈfʌŋ.ɡəs/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary English text, does "fungi" or "fungus" show up more?
"fungus" is the more common of the two: it sits at frequency rank #14,329 in our English list, against #15,414 for "fungi". 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 "fungi" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fungus" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #360,430 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "fungi" and "fungus" also get mixed up with nearby pairs, the highest-scored neighbour is "fugue vs fungus". 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 #360,430 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