Generally speaking there is no word which in and of itself is unparliamentary. It depends on the usage of the word and it depends on the context in which it is used.
With all respect to my colleagues, we do not use the word liar in the Chamber. We would not permit one member to call another member a liar. However, in the use of the word itself, if a member were to say “it has been said that I am a liar”, I would be hard pressed to stop the member from using the word about himself. I do not say this facetiously.
The words fabricated, hardly believable, unbelievable or incredible are all bordering on words that are unparliamentary. I would hope that words such as fabricated, fabrication and deliberately fabricated would not be used. That is why I caution members and I ask them not to use them in the course of our debates.
When we come that close I dislike intervening when a member is putting a question or giving an answer. Perhaps I will take the hon. member's admonition, if I can call it that, as a gentle admonition to the Chair. I will seriously consider these types of words when we even get close to an unparliamentary word and I will consider intervening more readily in the future.
I take the admonition in the spirit in which it is given.