ohm

Spelling & Dictionary Insight

The English entry for ohm is 3 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /əʊm/. Corpus data places it at rank #28,649 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it.The dominant gloss from Wiktionary reads: "In the International System of Units, the derived unit of electrical resistance; the electrical resistance of a device across which a potential difference of one volt causes a current of one ampere.".

No frequent misspelling variants are recorded for ohm in our index, suggesting the orthography either follows predictable English patterns or the word is uncommon enough that typo corpora lack signal.It also participates in 20 confusable-pair relationships, "on", "or", "OK", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Named after Bavarian physicist Georg Ohm. A German surname, first recorded in the 12th century, from German Ohm (“uncle”), from Proto-West Germanic *auhaim (“maternal uncle”), from or related to Proto-Germanic *awô (“grandfather, paternal uncle”) + *haimaz … Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is ohm, spelled O-H-M, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.