@synindex

The @synindex command is nearly the same as the @syncodeindex command, except that it does not put the `from' index entries into the @code font; rather it puts them in the roman font. Thus, you use @synindex when you merge a concept index into a function index.

See section Index Menus and Printing an Index, for information about printing an index at the end of a book or creating an index menu in an Info file.