notifyvsnotionTell them apart

Quick tell: notify is a verb, notion is a noun, so they fill different roles in a sentence.

Which to use

“notify” is a verb and “notion” is a noun - they look or sound alike but fill different roles in a sentence.

#10,734
“notify” frequency rank
#5,441
“notion” frequency rank
16175
confusion score

Side-by-Side Comparison

Feature notify notion
Definition To give (someone) notice (of some event). Mental apprehension of whatever may be known, thought, or imagined; idea, concept.

Where the eye mixes notify and notion

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. notify (CVCVCV) and notion (CVCVVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

6 ch
notify
6 ch
notion

Visual trap between notify and notion

These two trip readers on the page rather than in the ear: notify is /ˈnoʊtɪfaɪ/ while notion is /ˈnəʊʃən/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 16175, derived from the frequency rank of both members and their visual similarity.

notify is recorded at frequency rank #10,734, classified as averb, pronounced /ˈnoʊtɪfaɪ/. notion is at rank #5,441, tagged as anoun, pronounced /ˈnəʊʃən/.

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 16175, this pair ranks #459,425 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of notify vs notion

Shared letters: inot. Private to "notify": fy. Private to "notion": -.

"notify" · 6 letters · shape CVCVCV  ·  "notion" · 6 letters · shape CVCVVC

Known mistypes of this pair

  • notify ← nnotify · noitfy · notfiy · notiffy · notifyy · notiyf · nottify · ntoify
  • notion ← nnotion · noiton · nosion · notino · notionn · notoin · nottion · ntoion

Frequently Asked Questions

Can "notify" and "notion" be used interchangeably?
No - they are not even the same part of speech. "notify" is a verb and "notion" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "notify" or "notion" show up more?
"notion" is the more common of the two: it sits at frequency rank #5,441 in our English list, against #10,734 for "notify". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "notify" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "notion" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #459,425 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "notify" and "notion" also get mixed up with nearby pairs, the highest-scored neighbour is "notion vs notional". 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 #459,425 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