reaction

Spelling & Dictionary Insight

The English entry for reaction is 8 letters long, classified as anoun, and transcribed in the International Phonetic Alphabet as /ɹiˈækʃən/. Corpus data places it at rank #1,915 in overall English word frequency, indicating it appears regularly in written and spoken text.Wiktionary records 5 distinct senses for this headword, so context determines which meaning a reader should apply.

Our Hunspell-derived misspelling index lists 12 documented wrong-spelling variants for reaction, with forms such as "eraction", "raection", and "reacction". Each variant represents a distinct typo pattern that appears often enough in corpora to be worth flagging, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution.It also participates in 10 confusable-pair relationships, "reactor", "relation", "reactive", and more, where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: Inherited from Middle English reaccion, from Old French reaction, from Latin reāctiō, from the verb reagō, from re- (“again”) + agō (“to act”); more at re-, action; equivalent to react + -ion. 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 reaction, spelled R-E-A-C-T-I-O-N, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.