Bad spelling is a term used to describe words that are written incorrectly or with incorrect grammar. The three crossword solutions for the term bad spelling are HEX (3 letters), HEXES (5 letters) and BLACKMAGIC (10 letters). HEX and HEXES are both related to witchcraft and magic, while BLACKMAGIC is a type of dark magic. All three terms can be used to describe words that are written incorrectly or with incorrect grammar.