RDX
"rdx" is a 3-letter English headword indexed on PlainSpell.
The verdict
“RDX” is uncommon English (frequency #61,751 among 21,470 “R” headwords), classed as a noun. The kind of spelling people second-guess.
- #61,751
- frequency rank, English
- 21,470
- “R” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A high explosive used by the military and industry.
| Property | Value |
|---|---|
| Headword | RDX |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #61,751 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “RDX” sits in English frequency
Rare enough to double-check
RDX is uncommon English at frequency #61,751 among 21,470 “R” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A high explosive used by the military and industry.".
The misspelling generator found no plausible variants for RDX, since its letter sequence doesn't invite the usual edit-distance slips. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: Short for "research department explosive". The correct English form is RDX, spelled R-D-X.
Definition
- 1A high explosive used by the military and industry.
Etymology
Short for "research department explosive".
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
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Using “RDX”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is R-D-X - every other letter order is a misspelling in standard orthography.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this rank
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.