ispell-complete-word

ispell-complete-word is an interactive autoloaded compiled Lisp function in `ispell.el'.

It is bound to <menu-bar> <tools> <spell> <ispell-complete-word>.

(ispell-complete-word &optional INTERIOR-FRAG)

Try to complete the word before or under point.
If optional INTERIOR-FRAG is non-nil then the word may be a character
sequence inside of a word.

Standard ispell choices are then available.