What is this kind of spelling mistake called? [duplicate]

Consider the following sentence from this web page (a review of an episode from the TV show "How I Met Your Mother").

"The focus on Robin really aloud her character to get the kind of attention she has been missing for many a season."

Clearly, "aloud" should be "allowed". So, the writer has substituted one word with another that sounds the same when spoken, but is spelled differently and has a different meaning. What kind of spelling mistake do this call this in English?

Words that sound the same but have different meanings, such as aloud en allowed, are called homophones or, provided the spelling is different, heterographs.

So one could call a spelling mistake where a word is erroneously substituted by a heterograph, a homophonic or heterographic spelling error/mistake. Neither term has many Google hits, though.