The correct spelling of the word "fermentings" is spelled /fərˈmɛntɪŋz/. The IPA phonetic transcription helps explain the spelling of this word. The first syllable is pronounced as "fuh" with a schwa sound, followed by "r" and "m" sounds. The second syllable is "eh" with the short "e" vowel sound, "n," and "t" sounds. The final syllable is pronounced as "ingz" with the "ih" sound, "ng," and "z" sounds. Spellcheck may not recognize this word, but it is the correct spelling for the present participle of ferment.