CTR

noun

By · According to Wiktionary data (CC BY-SA) ·

"ctr" is a 3-letter English headword indexed on PlainSpell.

The verdict

“CTR” sits in 20 confusable pairs (corpus #29,985) as a noun. The look-alike neighbours are the real trap.

#29,985
frequency rank, English
5,599
“C” headwords
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Initialism of click-through rate.

Corpus desk

Index EN-ctr · CTR · English

CTR · rank #29,985 · 0 variants · 20 confusables

  • FREQ-MID #29,985
  • LEN-MID 3 letters
  • VOW-0 0 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-0 0 variants
  • BOOK-DENSE 5,599
  • PHOTO-FINISH crumb

Nearest frequency peer: crumb (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Frequency neighbourhood for “CTR”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “CTR” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

CTR vs CV
33% similar
CTR vs CU
33% similar
CTR vs CW
33% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for CTR
PropertyValue
HeadwordCTR
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#29,985
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “CTR” sits in English frequency

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).CTRlands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “crumb” (#29,984), “cote” (#29,983), “dames” (#29,988). Source: FrequencyWords open word-frequency list.

Easy to mix with look-alikes

The spelling risk for CTR is neighbouring look-alikes ("CV", "CU", …), not just typos; it is anoun. Frequency #29,985 among 5,599 “C” headwords. 4 recorded senses keep meaning in play.

Our edit-distance generator produced no likely misspellings for CTR, since its letter sequence doesn't invite the usual edit-distance slips. It also participates in 20 confusable-pair relationships, "CV", "CU", "CW", and more, where similar look or sound leads writers to substitute one word for another in context.

No documented word history exists for this headword, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct English form is CTR, spelled C-T-R.

Definition

  1. 1
    Initialism of click-through rate.
  2. 2
    Initialism of cash transaction report.
  3. 3
    Initialism of currency transaction report.
  4. 4
    Abbreviation of calcitonin receptor.

Recorded use

Wiktionary examples

These source excerpts show how CTR appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Remember Click-thru rate (CTR) is the number of people who click on an ad …
  2. Intriguingly, the rat C1b isoform of the calcitonin receptor (CTR) (see Section VI-B) has very little interaction with the thyroidally derived form of calcitonin.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "CTR"?
"CTR" is spelled C-T-R.
What does "CTR" mean?
As a noun, "CTR" means: Initialism of click-through rate.
What words are commonly confused with "CTR"?
"CTR" is commonly confused with "CV", "CU", "CW". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "CTR" come from?
"CTR" is a English word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "CTR", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 3 letters (nearest by frequency rank).

DRC#30,011bib#29,933BHP#29,932ayr#29,925

What to do next

You've looked up "CTR". Here's where to go from here.

  • "CTR" maps to 20 confusable pairs in this vintage; the highest-scored is "CV". View pair
  • Usage frequency rank #29,985 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "C" letter cohort. C–Z browse
  • PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list