Pyrex
"pyrex" is a 5-letter English headword indexed on PlainSpell.
The verdict
“Pyrex” is uncommon English (frequency #52,577 among 4,417 “P” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #52,577
- frequency rank, English
- 4,417
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A brand of glassware produced by the Corning corporation, capable of resisting high temperatures, and suitable for cooking applications, currently made with tempered glass.
Corpus desk
Index EN-pyrex · Pyrex · English
Pyrex · rank #52,577 · 0 variants · 0 confusables
- FREQ-RARE #52,577
- LEN-MID 5 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,417
- PHOTO-FINISH pupa
Nearest frequency peer: pupa (-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 “Pyrex”
Sparse band: bars invert rank so rarer forms read shorter
- ptr
ptr
47,430 corpus weight
- publican
publican
47,429 corpus weight
- pumice
pumice
47,427 corpus weight
- pupa
pupa
47,425 corpus weight
- Pyrex
Pyrex
47,424 corpus weight
- rancor
rancor
47,421 corpus weight
What this shows Long-tail view: where “Pyrex” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | Pyrex |
| Language | English |
| Part of speech | Proper noun |
| Letters | 5 |
| Frequency rank | #52,577 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “Pyrex” in English
Rare enough to double-check
Pyrex is uncommon English at frequency #52,577 among 4,417 “P” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. 2 senses are on record.
The misspelling generator found no plausible variants for Pyrex, and the word's spelling is regular enough that our generator found nothing worth flagging. This entry stands alone in our confusable dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From pie + r + -ex. First manufactured by the Corning Glassware Factory in 1915. * 1957, Letter from the Corning Glassware Factory: *: "We had a number of prior trademarks ending in the letters ex. One of the first commercial products to be sold under the n… The correct English form is Pyrex, spelled P-Y-R-E-X.
Definition
- 1A brand of glassware produced by the Corning corporation, capable of resisting high temperatures, and suitable for cooking applications, currently made with tempered glass.
- 2A brand of glassware produced by Corning using borosilicate glass.
Etymology
From pie + r + -ex. First manufactured by the Corning Glassware Factory in 1915. * 1957, Letter from the Corning Glassware Factory: *: "We had a number of prior trademarks ending in the letters ex. One of the first commercial products to be sold under the new mark was a pie plate, and in the interests of euphonism the letter "r" was inserted between pie and ex, and the whole thing condensed to pyrex." * The name also connotes the fire of pyro-.
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 "Pyrex", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 5 letters (nearest by frequency rank).