Emacs: Spell Checking
to check spelling of current word.
(useful when you are not sure how a word is spelled, but don't have
flyspell-mode on and don't want to
to spell check whole buffer.
flyspell-mode to turn on spell checker as you type.
Call again to turn off.
to move cursor to next error.
flyspell-mode is on.)
to correct the word under cursor.
Press the key again to swap to next suggestion.
You can add a keyboard shortcut to any of the command if it doesn't have one. See Emacs: How to Define Keys
or, buy something from Best Keyboard for Emacs