What is the correct spelling for RUNNIND?

If you're trying to correct the misspelling "runnind", there are a few possibilities. Firstly, it could be a simple typo of "running". Secondly, it could be an attempt to write "running" phonetically and in that case, "runnin'" is a popular alternative. Lastly, it could be a misspelling of "running" with an extra "n", so "running" would be the appropriate form.

Correct spellings for RUNNIND