supplemental
/ˌsʌplɪˈmɛntəl/
"supplemental" is a 12-letter English headword indexed on PlainSpell.
The verdict
“supplemental” has 17 generated spelling variants in the English index at frequency #15,285. The variants make it a useful spelling check.
- #15,285
- frequency rank, English
- 6,566
- “S” headwords
- 17
- tracked misspellings
- 2
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Acting to supplement.
Corpus desk
Index EN-supplemental · supplemental · English
supplemental · rank #15,285 · 17 variants · 2 confusables
- FREQ-MID #15,285
- LEN-MEGA 12 letters
- VOW-4 4 vowels
- CONFUS-LOW 2 pairs
- VAR-HIGH 17 variants
- BOOK-DENSE 6,566
- PHOTO-FINISH suspicions
Nearest frequency peer: suspicions (+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.
Frequency neighbourhood for “supplemental”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- stocking
stocking
84,720 corpus weight
- Suarez
Suarez
84,719 corpus weight
- supplemental
supplemental
84,716 corpus weight
- suspicions
suspicions
84,715 corpus weight
- swimmer
swimmer
84,714 corpus weight
- tao
tao
84,712 corpus weight
What this shows Bars show where “supplemental” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | supplemental |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˌsʌplɪˈmɛntəl/ |
| Letters | 12 |
| Frequency rank | #15,285 |
| Misspellings tracked | 17 |
| Confusable pairs | 2 |
| Source | Wiktionary (kaikki.org) |
Where “supplemental” sits in English frequency
A misspelling magnet
The generator records 17 spelling variants around supplemental (IPA /ˌsʌplɪˈmɛntəl/), anadjective. Corpus frequency is #15,285 among 6,566 “S” headwords. Wiktionary lists 3 senses, so context still picks the gloss.
Our generated misspelling index lists 17 likely wrong-spelling variants for supplemental, with forms such as "spuplemental", "ssupplemental", and "suplemental". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 2 confusable-pair relationships, "supplementary", "supplement", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From supplement + -al. The correct English form is supplemental, spelled S-U-P-P-L-E-M-E-N-T-A-L.
Definition
- 1Acting to supplement.
- 2Appending.
- 3Lacking a regular schedule (as in a supplemental airline).
Recorded use
Wiktionary exampleThese source excerpts show how supplemental appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The supplementary bibliography (in Vol. VI) attests to the comprehensiveness of the effort.
Etymology
From supplement + -al.
Common misspellings
Also misspelled as:
- spuplemental
- ssupplemental
- suplemental
- suplpemental
- suppelmental
- suppleemntal
- supplemenatl
- supplemenntal
- supplementall
- supplementla
- supplementtal
- supplemetnal
- supplemmental
- supplemnetal
- suppllemental
- supplmeental
- uspplemental
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of supplemental - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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
How do you spell "supplemental"?
What does "supplemental" mean?
What words are commonly confused with "supplemental"?
How do you pronounce "supplemental"?
What is the origin of the word "supplemental"?
Is PlainSpell free to use?
Similar English words by spelling shape
Same letter count and similar misspelling depth for "supplemental", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 12 letters (nearest by frequency rank).
Similar misspelling depth
Headwords with a similar count of attested misspellings (17 here; floor ≥5).
What to do next
You've looked up "supplemental". Here's where to go from here.
- "supplemental" maps to 2 confusable pairs in this vintage; the highest-scored is "supplementary". View pair
- 17 edit-distance misspelling variants are generated for spell-check research on this headword. See variants
- Usage frequency rank #15,285 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "S" letter cohort. S–Z browse
- PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.