OK, here's what I'm proposing: Say you're doing something mundane and want to know how to spell a word and you don't want to open up a big program just to grok the spell checker. All you want to do is hit Win+R or a CLI terminal and type:
spell <insert word here>
and you'll get either a confirmation of your Jedi spelling skills, or a gentle rebuke with a suggestion or two (a la Google when it says "Did you mean...")
I realize there probably is a program like that somewhere, but I haven't been able to find it, and Clipboard Help 'n Spell is more than what I'm looking for...