apropos-synonyms

apropos-synonyms is a variable defined in `apropos.el'.
Its value is

(("find" "open" "edit")
 ("kill" "cut")
 ("yank" "paste")
 ("region" "selection"))

Documentation:
List of synonyms known by apropos.
Each element is a list of words where the first word is the standard Emacs
term, and the rest of the words are alternative terms.