IBM Professional Series User Manual page 293

The names you define can be used either instead of or in
conjunction with the standard eMS command truncations.
However, no matter what truncations, synonyms, or
truncations of the synonyms are in effect, the full real name
of the command is always accepted. The format of the
SYNONYM command is:
SYNonym
en [SYNONYM [~JJJ [(opt ions ... [)]]
options:
[
STO ] [CLEAR]
NOSTO
[
USER ]
SYSTEM
Where:
fn
fm
is the filename of the file containing your synonyms
table.
is the filemode of the file containing your synonyms; if
omitted, your A-disk and its extensions are searched. If
you specify fm, you must enter the keyword,
SYNONYM.
If
you specify fm as an asterisk (*), all
disks are searched for the specified SYNONYM file.
Options:
STO
specifies that standard eMS abbreviations are accepted.
NOSTD
standard eMS abbreviations are not to be accepted.
(The full eMS command and the synonyms you defined
can still be used.)
CLEAR
removes any synonym table set by a previously entered
SYNONYM command.
USER
specifies that the user synonym table is to be modified.
7-120 VM/PC Users Guide