costlessly
"costlessly" is a 10-letter English headword indexed on PlainSpell.
The verdict
“costlessly” is uncommon English (outside the top frequency list), classed as an adverb. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 10
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Without cost.
Corpus desk
Index EN-costlessly · costlessly · English
costlessly · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 10 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "C" 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 | costlessly |
| Language | English |
| Part of speech | Adverb |
| Letters | 10 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “costlessly” in English
Rare enough to double-check
costlessly is uncommon English outside the top frequency list, classed as anadverb. Rarity is why readers land here mid-draft. Gloss: "Without cost.".
We couldn't generate a plausible misspelling set for costlessly, suggesting the orthography follows predictable English patterns. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From costless + -ly. The correct English form is costlessly, spelled C-O-S-T-L-E-S-S-L-Y.
Definition
- 1Without cost.
Etymology
From costless + -ly.
Synonyms
Antonyms
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.