radiotherapy

noun

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

"radiotherapy" is a 12-letter English headword indexed on PlainSpell.

The verdict

“radiotherapy” has 18 generated spelling variants in the English index at frequency #26,219. The variants make it a useful spelling check.

#26,219
frequency rank, English
3,094
“R” headwords
18
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Synonym of radiation therapy.

Corpus desk

Index EN-radiotherapy · radiotherapy · English

radiotherapy · rank #26,219 · 18 variants · 0 confusables

  • FREQ-MID #26,219
  • LEN-MEGA 12 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 18 variants
  • BOOK-MID 3,094
  • PHOTO-FINISH rationally

Nearest frequency peer: rationally (+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.

Rank peers near misspelling magnet “radiotherapy”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “radiotherapy” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for radiotherapy
PropertyValue
Headwordradiotherapy
LanguageEnglish
Part of speechNoun
Letters12
Frequency rank#26,219
Misspellings tracked18
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “radiotherapy”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).radiotherapylands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “rationally” (#26,220), “purposefully” (#26,216), “Reddy” (#26,222). Among 3,094 “R” headwords, “radiotherapy” is #26,219. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 18 spelling variants around radiotherapy, anoun. Corpus frequency is #26,219 among 3,094 “R” headwords. Dominant gloss: "Synonym of radiation therapy.".

Our generated misspelling index lists 18 likely wrong-spelling variants for radiotherapy, with forms such as "ardiotherapy", "raddiotherapy", and "radiohterapy". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. This headword has no recorded confusable partner, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From radio- + therapy. The correct English form is radiotherapy, spelled R-A-D-I-O-T-H-E-R-A-P-Y.

Definition

  1. 1
    Synonym of radiation therapy.

Etymology

From radio- + therapy.

This word in other languages

radioterapia(Español)radiothérapie(Français)Radiotherapie(Deutsch)

Common misspellings

Also misspelled as:

  • ardiotherapy
  • raddiotherapy
  • radiohterapy
  • radiotehrapy
  • radiothearpy
  • radiotherappy
  • radiotherapyy
  • radiotherayp
  • radiotherpay
  • radiotherrapy
  • radiothherapy
  • radiothreapy
  • radiottherapy
  • raditoherapy
  • radoitherapy
  • raidotherapy
  • rdaiotherapy
  • rradiotherapy

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of radiotherapy - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

ardiotherapy2raddiotherapy1radiohterapy2radiotehrapy2radiothearpy2radiotherappy1radiotherapyy1radiotherayp2
Edit distance from "radiotherapy"

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 "radiotherapy"?
"radiotherapy" is spelled R-A-D-I-O-T-H-E-R-A-P-Y.
What does "radiotherapy" mean?
As a noun, "radiotherapy" means: Synonym of radiation therapy.
What are common misspellings of "radiotherapy"?
Common misspellings include "ardiotherapy", "raddiotherapy", "radiohterapy", "radiotehrapy", "radiothearpy". The correct spelling is "radiotherapy".
What is the origin of the word "radiotherapy"?
From radio- + therapy. See the full etymology section above for more details.
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 "radiotherapy", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

purposefully#26,216meticulously#26,167suspiciously#26,273unmistakable#26,293

Similar misspelling depth

Headwords with a similar count of attested misspellings (18 here; floor ≥5).

metaphysics18 variantsheterogeneous18 variantsamalgamation18 variantsworkmanship18 variants

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

Source: FrequencyWords open word-frequency list