I'm a pretty good speller, but sometimes I just want to check for typing errors.  Is there a spell check in AutoCAD?
Sure is, just type in SPELL type in all to check everything or select the text objects that you want to check.  This command will not check dimension objects, but will check text entities within block definitions.
Quick reference note.  Most Windows programs, other than AutoCAD, use the F7 key for spell check.