supplemental
/ˌsʌpləˈmɛntəl/adjective, noun
supplemental is spelled S-U-P-P-L-E-M-E-N-T-A-L: 12 letters and 4 syllables. It appears 3.1 times per million words in written English, the 15,146th most frequent word form (wordfreq, 2021 data). As an adjective, supplemental means “Acting to supplement” (English Wiktionary, September 2026).
How many letters and syllables are in supplemental?
| Letters | 12: S-U-P-P-L-E-M-E-N-T-A-L |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | 3.1 times per million words; the 15,146th most frequent word form |
| Wrong spellings searched | none 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 supplemental?
Supplemental appears 3.1 times per million words in written English, the 15,146th 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 supplemental?
- UK /ˌsʌplɪˈmɛntəl/
- US /ˌsʌpləˈmɛntəl/
- Australia /ˌsapləˈmentəl/
Supplemental 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)-Vealhurl-supplemental.wav, Wikimedia Commons (author and licence on each file's page).
What rhymes with supplemental?
The 12 most written words on PlainSpell end in the same sounds as supplemental from its last stressed vowel (/ɛntəl/):
- environmental
- fundamental
- dental
- parental
- monumental
- ornamental
- departmental
- intercontinental
- judgemental
- consonantal
- labiodental
- tempermental
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 supplemental
- more supplemental comparative
- most supplemental superlative
- supplementals plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does supplemental mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Acting to supplement.
- 2
Appending.
- 3
Lacking a regular schedule (as in a supplemental airline).
noun
- 1
Something that supplements or adds to.
- 2
A requisition or article of legislation that provides additional funding for a program.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does supplemental come from?
From supplement + -al.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).