Hi,
not sure if this is what you are trying to get happen, but when I
start up quicksilver (cmd+space) and press the period key "." (text
mode) and type in the notification "pizza" and then tab over it by
default chooses "large type" which will display the word pizza in
large text on the screen. With advanced mode turned on, you can tab
over after typing in the text, and large type is chosen press ctrl
+enter and choose to run the operation at a later time.
Hope this helps,
C