samplevssimplexWhich spelling fits?

Quick tell: sample is a noun, simplex is an adjective, so they fill different roles in a sentence.

Which to use

“sample” is a noun and “simplex” is an adjective - they look or sound alike but fill different roles in a sentence.

#2,859
“sample” frequency rank
#30,229
“simplex” frequency rank
33088
confusion score

Side-by-Side Comparison

Feature sample simplex
Definition A part or snippet of something taken or presented for inspection, or shown as evidence of the quality of the whole; a specimen. Having a single structure; not composite or complex; undivided, unitary.

Where the eye mixes sample and simplex

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.

6 ch
sample
7 ch
simplex

Look-alike desk: sample vs simplex

These two trip readers on the page rather than in the ear: sample is /ˈsɑːm.pəl/ while simplex is /ˈsɪmplɛks/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 33088, derived from the frequency rank of both members and their visual similarity.

sample is recorded at frequency rank #2,859, classified as anoun, pronounced /ˈsɑːm.pəl/. simplex is at rank #30,229, tagged as anadj, pronounced /ˈsɪmplɛks/.

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 33088, this pair ranks #332,361 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sample vs simplex

Shared letters: elmps. Private to "sample": a. Private to "simplex": ix.

"sample" · 6 letters · shape CVCCCV  ·  "simplex" · 7 letters · shape CVCCCVC

Known mistypes of this pair

  • sampleasmple · samlpe · sammple · sampel · samplle · sampple · sapmle · smaple
  • simplexismplex · simlpex · simmplex · simpelx · simplexx · simpllex · simplxe · simpplex

Frequently Asked Questions

Is swapping "sample" for "simplex" ever safe?
No - they are not even the same part of speech. "sample" is a noun and "simplex" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "sample" vs "simplex" - which ranks higher?
"sample" is the more common of the two: it sits at frequency rank #2,859 in our English list, against #30,229 for "simplex". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

  • Full dictionary entry for "sample" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "simplex" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #332,361 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "sample" and "simplex" also get mixed up with nearby pairs, the highest-scored neighbour is "sampler vs simplex". 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 #332,361 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