radioactive

Name: radioactive, English Word Data
Creator: Wiktionary
License: https://creativecommons.org/licenses/by-sa/4.0/

/ˌɹeɪdiəʊˈaktɪv/

//ˌɹeɪdiəʊˈaktɪv// adj

By PlainSpell · According to Wiktionary data (CC BY-SA) · analyzed September 3, 2026

The verdict

“radioactive” has 15 generated spelling variants in the English index at frequency #10,916. The variants make it a useful spelling check.

#10,916
frequency rank, English: 3,094
“R” headwords: 15
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Exhibiting radioactivity.

Corpus desk

Index EN-radioactive · radioactive · English

radioactive · rank #10,916 · 15 variants · 0 confusables

FREQ-MID #10,916
LEN-MEGA 11 letters
VOW-6 6 vowels
CONFUS-0 No pairs
VAR-HIGH 15 variants
BOOK-MID 3,094
PHOTO-FINISH quoting

Nearest frequency peer: quoting (-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.

prose

89,088
prostitution

89,087
quoting

89,086
radioactive

89,085
raining

89,084
rang

89,083

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

Key facts for radioactive
Property	Value
Headword	radioactive
Language	English
Part of speech	Adjective
IPA	/ˌɹeɪdiəʊˈaktɪv/
Letters	11
Frequency rank	#10,916
Misspellings tracked	15
Confusable pairs	0
Source	Wiktionary (kaikki.org)

Frequency seat of misspelling magnet “radioactive”

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).radioactivelands here:

#10,916

#1#100#1K#10K#100K

← used constantlyrarely used →

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “quoting” (#10,915), “raining” (#10,917), “prostitution” (#10,914). Among 3,094 “R” headwords, “radioactive” is #10,916. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 15 spelling variants around radioactive (IPA /ˌɹeɪdiəʊˈaktɪv/), anadjective. Corpus frequency is #10,916 among 3,094 “R” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 15 likely wrong-spelling variants for radioactive, with forms such as "ardioactive", "raddioactive", and "radiaoctive". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It is not paired with a close-neighbour confusable in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: Coined by Pierre Curie and Marie Curie in 1898 as French radio-actif, equivalent to English radio- + active. The correct English form is radioactive, spelled R-A-D-I-O-A-C-T-I-V-E.

Definition

1
Exhibiting radioactivity.
2
Dangerous and disgusting, particularly of people or ideas.

Recorded use

Wiktionary examples

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

As a matter of fact many of our best drinking waters have all sorts of unspecified qualities. Burton water, for example, is radioactive by Beetham's standards up to the ninth degree.
Today, no one would intentionally smear radioactive materials on their face, but in 1933, the dangers of radioactivity were not yet fully understood.

Etymology

Coined by Pierre Curie and Marie Curie in 1898 as French radio-actif, equivalent to English radio- + active.

This word in other languages

radiactivo(Español)radioactif(Français)radioaktiv(Deutsch)radioativo(Português)

Common misspellings

Also misspelled as:

ardioactive
raddioactive
radiaoctive
radioacctive
radioacitve
radioactiev
radioactivve
radioacttive
radioactvie
radioatcive
radiocative
radoiactive
raidoactive
rdaioactive
rradioactive

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of radioactive - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

Edit distance from "radioactive"

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 "radioactive"?

"radioactive" is spelled R-A-D-I-O-A-C-T-I-V-E. The IPA pronunciation is /ˌɹeɪdiəʊˈaktɪv/.

What does "radioactive" mean?

As an adjective, "radioactive" means: Exhibiting radioactivity.

What are common misspellings of "radioactive"?

Common misspellings include "ardioactive", "raddioactive", "radiaoctive", "radioacctive", "radioacitve". The correct spelling is "radioactive".

How do you pronounce "radioactive"?

The IPA (International Phonetic Alphabet) transcription for "radioactive" is /ˌɹeɪdiəʊˈaktɪv/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.

What is the origin of the word "radioactive"?

Coined by Pierre Curie and Marie Curie in 1898 as French radio-actif, equivalent to English radio- + active. 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 "radioactive", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

realization#10,920 philosopher#10,906 persecution#10,904 sponsorship#10,936

Similar misspelling depth

Headwords with a similar count of attested misspellings (15 here; floor ≥5).

presently15 variants sacrifices15 variants occupational15 variants strawberry15 variants