"::::B2C, you introduced the notion of meeting WP:COMMONALITY as a matter of degree. I, though, have taken is as a mere hurdle requirement. In this case, both spellings plainly meet that requirement, so it is reasonable to move on to other considerations. Here there are two: consistency within the article, and consistency between similar articles (a desideratum according to policy at WP:TITLE). The article is written in British English (for example with goitre, not goiter); so a spelling that tends the British way gives internal consistency. Do you find that other titles include semantically related forms beginning with ""iodiz-"", or ""iodis-""? I don't. I therefore think there is no
"::::B2C, you introduced the notion of meeting WP:COMMONALITY as a matter of degree. I, though, have taken is as a mere hurdle requirement. In this case, both spellings plainly meet that requirement, so it is reasonable to move on to other considerations. Here there are two: consistency within the article, and consistency between similar articles (a desideratum according to policy at WP:TITLE). The article is written in British English (for example with goitre, not goiter); so a spelling that tends the British way gives internal consistency. Do you find that other titles include semantically related forms beginning with ""iodiz-"", or ""iodis-""? I don't. I therefore think there is no need