on board
"on-board" is a 7-letter English headword indexed on PlainSpell.
The verdict
“on board” is uncommon English (outside the top frequency list), classed as a preposition. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - On or in (a means of transportation).
Corpus desk
Index EN-on-board · on board · English
on board · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 8 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "O" thin
- PHOTO-UNK Peer pending
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.
| Property | Value |
|---|---|
| Headword | on board |
| Language | English |
| Part of speech | Preposition |
| Letters | 8 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “on board” in English
Rare enough to double-check
on board is uncommon English outside the top frequency list, classed as apreposition. Rarity is why readers land here mid-draft. Gloss: "On or in (a means of transportation).".
on board doesn't appear in our generated misspelling index, since its letter sequence doesn't invite the usual edit-distance slips. Our dataset records no confusable match here, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: Originally a literal reference to the wooden boards of the deck of a boat or ship. The correct English form is on board, spelled O-N- -B-O-A-R-D.
Definition
- 1On or in (a means of transportation).
Recorded use
Wiktionary examplesThese source excerpts show how on board appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
On board his boat were various firearms but not much food.
Even when I am on board the plane, I can never feel secure that my luggage is, too.
Etymology
Originally a literal reference to the wooden boards of the deck of a boat or ship.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.