# supplemental

> English word · Adjective · IPA /ˌsʌplɪˈmɛntəl/ · frequency rank #15,285

## Definitions
1. Acting to supplement.
2. Appending.
3. Lacking a regular schedule (as in a supplemental airline).

## Etymology
From supplement + -al.

## Easily confused with
- **supplementary** (https://plainspell.com/en/vs/supplemental-vs-supplementary)
- **supplement** (https://plainspell.com/en/vs/supplement-vs-supplemental)

## Common misspellings (17)
`spuplemental`, `ssupplemental`, `suplemental`, `suplpemental`, `suppelmental`, `suppleemntal`, `supplemenatl`, `supplemenntal`, `supplementall`, `supplementla`, `supplementtal`, `supplemetnal`, `supplemmental`, `supplemnetal`, `suppllemental`, `supplmeental`, `uspplemental`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/supplemental