Sentence:  Beside ninety-odd correct "ea" spellings, Belfour IX has twelve plainly monophthongized and one <WSD>reverse spelling</WSD>, with a penumbra of phonetically special cases. 
Meaning of the word marked with <WSD> tags:  A specific spelling of a word representing a phonetic feature never present in it, but present in other words in the same phonetic environment (and later lost); an inverse spelling.