pseudoephedrine
/sjuː.dəʊˈɛf.ə.dɹiːn/
"pseudoephedrine" is a 15-letter English headword indexed on PlainSpell.
The verdict
“pseudoephedrine” is uncommon English (frequency #76,241 among 4,417 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #76,241
- frequency rank, English
- 4,417
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A sympathomimetic alkaloid commonly used as a decongestant; a chemical compound, an isomer of ephedrine, with the formula C₁₀H₁₅NO.
Corpus desk
Index EN-pseudoephedrine · pseudoephedrine · English
pseudoephedrine · rank #76,241 · 0 variants · 0 confusables
- FREQ-RARE #76,241
- LEN-MEGA 15 letters
- VOW-7 7 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,417
- PHOTO-FINISH proscenium
Nearest frequency peer: proscenium (-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.
Long-tail ranks near “pseudoephedrine”
Sparse band: bars invert rank so rarer forms read shorter
- projectioni…
projectionist
23,763 corpus weight
- projet
projet
23,762 corpus weight
- proscenium
proscenium
23,761 corpus weight
- pseudoephed…
pseudoephedrine
23,760 corpus weight
- pulver
pulver
23,758 corpus weight
- pursing
pursing
23,757 corpus weight
What this shows Long-tail view: where “pseudoephedrine” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | pseudoephedrine |
| Language | English |
| Part of speech | Noun |
| IPA | /sjuː.dəʊˈɛf.ə.dɹiːn/ |
| Letters | 15 |
| Frequency rank | #76,241 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “pseudoephedrine” in English
Rare enough to double-check
pseudoephedrine is uncommon English at frequency #76,241 among 4,417 “P” headwords, classed as anoun, transcribed /sjuː.dəʊˈɛf.ə.dɹiːn/. Rarity is why readers land here mid-draft. Gloss: "A sympathomimetic alkaloid commonly used as a decongestant; a chemical compound, an isomer of ephedrine, with the formula C₁₀H₁₅NO.".
Our edit-distance generator produced no likely misspellings for pseudoephedrine, and the word's spelling is regular enough that our generator found nothing worth flagging. No close-neighbour confusable shows up for this headword in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.
Etymologically, the entry records: From pseudo- + ephedrine. The correct English form is pseudoephedrine, spelled P-S-E-U-D-O-E-P-H-E-D-R-I-N-E.
Definition
- 1A sympathomimetic alkaloid commonly used as a decongestant; a chemical compound, an isomer of ephedrine, with the formula C₁₀H₁₅NO.
Etymology
From pseudo- + ephedrine.
This word in other languages
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "pseudoephedrine", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 15 letters (nearest by frequency rank).