Some options have alternative names. These aliases are never used for output, but can be used just like normal option names when specifying options to the shell.
BRACE_EXPAND
NO_IGNORE_BRACES
(ksh and bash compatibility)
DOT_GLOB
GLOB_DOTS
(bash compatibility)
HASH_ALL
HASH_CMDS
(bash compatibility)
HIST_APPEND
APPEND_HISTORY
(bash compatibility)
HIST_EXPAND
BANG_HIST
(bash compatibility)
LOG
NO_HIST_NO_FUNCTIONS
(ksh compatibility)
MAIL_WARN
MAIL_WARNING
(bash compatibility)
ONE_CMD
SINGLE_COMMAND
(bash compatibility)
PHYSICAL
CHASE_LINKS
(ksh and bash compatibility)
PROMPT_VARS
PROMPT_SUBST
(bash compatibility)
STDIN
SHIN_STDIN
(ksh compatibility)
TRACK_ALL
HASH_CMDS
(ksh compatibility)