(1) Demonstration (noun, adj) - used in engineering and business.
(2) Demonstrate (verb) - used in engineering and business.
(3) Demographic (noun) - The target demographic. Used by political types.
(4) Democratic (adj) - confusingly, also used by political types.
(5) Demolish (verb) - used by building contractors.
They're doing the new product demo at 3:00 in the conference room.
It's not the real thing, it's only a demo.
It's just demo code. We'll rewrite it when we have a spec to work from.
They want us to demo the final release version on-site next week.