fibreglass
fi·bre·glass/ˈfaɪbəɡlɑːs/noun, verb
fibreglass is spelled F-I-B-R-E-G-L-A-S-S: 10 letters and 3 syllables (fi·bre·glass). It appears about once in every 3 million words in written English, the 51,129th most frequent word form (wordfreq, 2021 data). As a noun, fibreglass means “Silica based glass extruded into fibers that possess a length at least 1000 times greater than their width” (English Wiktionary, September 2026). The plural of fibreglass is fibreglasses.
How many letters and syllables are in fibreglass?
| Letters | 10: F-I-B-R-E-G-L-A-S-S |
|---|---|
| Syllables | 3: fi·bre·glass |
| In writing | about once in every 3 million words; the 51,129th most frequent word form |
| Wrong spellings searched | none measured in search |
| Pairs people search | |
| Same letters |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is fibreglass?
Fibreglass appears about once in every 3 million words in written English, the 51,129th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce fibreglass?
- UK /ˈfaɪbəɡlɑːs/
Fibreglass has 3 syllables, split fi·bre·glass in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-fibreglass.wav, Wikimedia Commons (author and licence on each file's page).
Words people confuse with fibreglass
Word pairs people search, with the monthly searches for “a vs b” (G: Google, B: Bing, United States).
Also written: fiberglass.
Sources: Google and Bing searches (September 2025 to August 2026, through DataForSEO); English Wiktionary (homophones, alternative spellings).
What rhymes with fibreglass?
No other word on PlainSpell ends in the same sounds as fibreglass (/aɪbəɡlɑs/).
Spelled with the same letters in another order: fiberglass.
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of fibreglass
- fibreglasses plural, present, singular, he/she/it
- fiberglass US
- fibreglassing participle, present
- fibreglassed participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does fibreglass mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
UKSilica based glass extruded into fibers that possess a length at least 1000 times greater than their width.
- 2
UKEllipsis of fibreglass wool.
- 3
UKA composite material made from fine fibres of spun glass held together with resin.
verb
- 1
UKTo apply fibreglass to.
to fibreglass the hull of a fishing boat
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you abbreviate fibreglass?
Wiktionary records one abbreviation of fibreglass: glass.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Fibreglass in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| German | Glasfaser, Glasfasern , Glasfaserverstärkter Kunststoff, GFK, Fiberglas |
| Spanish | fibra de vidrio , plástico reforzado con fibra de vidrio, plástico reforzado con vidrio |
| French | plastique à renfort de verre |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does fibreglass come from?
Compound of fibre + glass.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).