formaldehyde

Spelling & Dictionary Insight

The English entry for formaldehyde is 12 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /fɔː(ɹ)ˈmældɪhaɪd/. Corpus data places it at rank #30,049 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "The simplest aldehyde, HCHO, a colourless gas that has many industrial applications; it dissolves in water to give formol (10%) and formalin.".

Our generated misspelling index lists 19 likely wrong-spelling variants for formaldehyde, with forms such as "fformaldehyde", "fomraldehyde", and "foramldehyde". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From form(yl) + aldehyde. 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 formaldehyde, spelled F-O-R-M-A-L-D-E-H-Y-D-E, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.