VMS Help MMS, Description File, Predefined functions, Text operations, JOIN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    $(JOIN list,text)

    Concatenates word by word. Each word in 'text' is appended to the
    corresponding word in 'list' to form a word in the result. When
    the number of words in 'list' and 'text' are not the same, the
    remaining words from the longer list are simply appended to the
    result.