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PlainSpell

interstitial

/ɪntəɹˈstɪʃəl/adjective, noun

interstitial is spelled I-N-T-E-R-S-T-I-T-I-A-L: 12 letters and 4 syllables. It appears about once in every 2 million words in written English, the 37,943rd most frequent word form (wordfreq, 2021 data). As an adjective, interstitial means “Of, relating to, or situated in an interstice” (English Wiktionary, September 2026).

How many letters and syllables are in interstitial?

Letters12: I-N-T-E-R-S-T-I-T-I-A-L
Syllables4 (from its American pronunciation)
In writingabout once in every 2 million words; the 37,943rd most frequent word form
Wrong spellings searchednone measured in search
Rhymes with

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.

How common is interstitial?

Interstitial appears about once in every 2 million words in written English, the 37,943rd 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 interstitial?

  • UK /ɪntəˈstɪʃəl/
  • US /ɪntəɹˈstɪʃəl/

Interstitial has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Wodencafe-interstitial.wav, LL-Q1860_(eng)-Vealhurl-interstitial.wav, Wikimedia Commons (author and licence on each file's page).

What rhymes with interstitial?

6 words on PlainSpell end in the same sounds as interstitial from its last stressed vowel (/ɪʃəl/):

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 interstitial

  • interstitials plural

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does interstitial mean?

The meanings the English Wiktionary records, quoted as written there (source below).

adjective

  1. 1

    Of, relating to, or situated in an interstice.

    The novel's interstitial chapters.

noun

  1. 1

    A web page, usually carrying advertising, displayed when leaving one content page for another.

    An interstitial appeared before the download.

  2. 2

    An interstitial discontinuity in a crystal.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Interstitial in Spanish, French, German and Portuguese

LanguageWords
Frenchinterstitiel (of, relating to, or situated in an interstice), publicité interstitielle (web page displayed before a content page)
GermanZwischen-, zwischenliegend (of, relating to, or situated in an interstice), Interstitial (web page displayed before a content page), Zwischengitteratom (interstitial discontinuity in a crystal)
Portugueseintersticial (of, relating to, or situated in an interstice), anúncio intersticial (web page displayed before a content page), interstício (interstitial discontinuity in a crystal)
Spanishintersticial (of, relating to, or situated in an interstice)

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 interstitial come from?

From Latin interstitiālis. By surface analysis, interstitium + -al.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after interstitial