-oid
/-ɔɪd/
"oid" is a 3-letter English headword indexed on PlainSpell.
The verdict
“-oid” is uncommon English (outside the top frequency list), classed as a suffix. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 4
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Resembling; having the likeness of (usually including the concept of not being the same despite the likeness, but counterexamples exist).
Corpus desk
Index EN-oid · -oid · English
-oid · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MID 4 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "-" 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 | -oid |
| Language | English |
| Part of speech | Suffix |
| IPA | /-ɔɪd/ |
| Letters | 4 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “-oid” sits in English frequency
Rare enough to double-check
-oid is uncommon English outside the top frequency list, classed as asuffix, transcribed /-ɔɪd/. Rarity is why readers land here mid-draft. 4 senses are on record.
-oid has no tracked misspelling variants, and the word's spelling is regular enough that our generator found nothing worth flagging. We don't track a confusable pairing for this entry, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: Learned borrowing from Latin -oīdēs, from Ancient Greek -ο-ειδής (-o-eidḗs) (the ο being the last vowel of the stem to which the suffix is attached); from εἶδος (eîdos, “form, likeness”). The correct English form is -oid, spelled --O-I-D.
Definition
- 1Resembling; having the likeness of (usually including the concept of not being the same despite the likeness, but counterexamples exist).
- 2Of, pertaining to, or related to.
- 3Added to nouns to create derogatory terms, typically referring to a particular ideology or group of people.
- 4Added typically to the name of an algebraic structure, to denote the horizontal categorification of that structure.
Etymology
Learned borrowing from Latin -oīdēs, from Ancient Greek -ο-ειδής (-o-eidḗs) (the ο being the last vowel of the stem to which the suffix is attached); from εἶδος (eîdos, “form, likeness”).
This word in other languages
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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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.