just type /change word word2 and everytime you type word it will
show it as word2 (only an example..)
alias change { if ($1) && ($2) { set %word.b $1 | set %word.g $2 } }
on *:INPUT:*: { if ($left($1,1) != /) { msg $active $replace($1-,%word.b,%word.g) | haltdef } }