I am confused whenever I face the word enthusiastic ( ?) and its family word form ........

I always misspell the word "tomorrow" as tommorrow.

Jocke. I mean joke of course, but always add that C.

Wensday, thorogh, obnoxish, sinserly, savior, actnowlege, tommorroww, pronunciasion Oh, these are all mis-spelled. Can you correct them?

I confuse words that use double f with those that use only one. Like different, efficacious, prefer, refer, etc.