pentad
/ˈpɛnˌtæd/
"pentad" is a 6-letter English headword indexed on PlainSpell.
The verdict
“pentad” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 6
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Synonym of quintet: A group of five things, particularly
Corpus desk
Index EN-pentad · pentad · English
pentad · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 6 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "P" 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 | pentad |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈpɛnˌtæd/ |
| Letters | 6 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “pentad” in English
Rare enough to double-check
pentad is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈpɛnˌtæd/. Rarity is why readers land here mid-draft. 4 senses are on record.
Our edit-distance generator produced no likely misspellings for pentad, suggesting the orthography follows predictable English patterns. This headword has no recorded confusable partner, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: From Ancient Greek πεντάς (pentás), from πέντε (pénte, “five”) + -άς (-ás, “-ad”). By surface analysis, pent- + -ad. The correct English form is pentad, spelled P-E-N-T-A-D.
Definition
- 1Synonym of quintet: A group of five things, particularly
- 2Synonym of quintet: A group of five things, particularly
- 3Synonym of quintet: A group of five things, particularly
- 4Synonym of quintet: A group of five things, particularly
Recorded use
Wiktionary exampleThese source excerpts show how pentad appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Nitrogen is a pentad in the ammonium compounds.
Etymology
From Ancient Greek πεντάς (pentás), from πέντε (pénte, “five”) + -άς (-ás, “-ad”). By surface analysis, pent- + -ad.
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.