"Alternative spelling" refers to different ways of writing a word while keeping the same pronunciation and meaning. It means there are multiple correct ways to spell a word, offering options for how it can be written. Full definition
There are many alternative spellings of the name Riley, and multiple ways parents can make it unique to their little girl. (babygaga.com)
Other things you could do include displaying your product dimensions in inches as well as centimetres and add alternative spellings in your descriptions. (blog.folksy.com)
Pouffes are also called poufs and pods on websites, so try alternative spellings when making a search. (idealhome.co.uk)