If you meant to type "isthmus" but misspelled it as "istmus", here are some possible correct suggestions. First, try adding an 'h' between 't' and 'm' to get "isthmus". Another option is to replace 'u' with 'h,' giving you "isthmus". Lastly, you can try adding an 'n' after 't' to form "isthmuns". Remember to proofread for accuracy!
