- When something is "false" it means that it is not the truth. - Hypocritical is when someone who say they believe in certain morals, actions, religions and so on. But doesn't actually BELIEVE in such things. For Example: A Christian who steals is a "hypocrite" as one of his rules of his belief is not to steal. - Fictitious can be multiple things such as books and stories. They are stories that are not real and don't contain any form of truth in them. These books would be found in the "Fiction" section of a library. Finally all three words do contain the same definition but have a different context so all I can say that they are used equally as much as each other. I would add though that you may find the word "lie" useful. A "lie" is when someone does not tell the truth and such things happens quite frequently in everyday life unfortunately. Hope this helps.

It's not a matter of British or American dialect. These are all different words with distinct meanings: http://en.wiktionary.org/wiki/false http://en.wiktionary.org/wiki/hypocritical http://en.wiktionary.org/wiki/fictitious