Demonstration
Computers: Software, application The world: Event, activity
App, program, executable, (only for .exes though) etc...
The word and can be replaced by the ampersand (&) or by the phrase "as well as"; there is no single word that replaces it, however.
Whither. (Example: "Where have they gone?" "Whither have they gone?") Although, like the word "thither", people don't use the word a lot anymore.
Fired or sacked
App, software, program. There are several words to replace application. My appologies if you were looking for 'the application of'.
Programme
Thy?
switched or another one
Another word for dmand is ask with force.
existing
Demonstration
One such word is resume.
Obsessed is another word that can replace addicted.
replacement
Women