Traitorousness is the act of betraying someone or something, and it is often associated with dishonesty, disloyalty, and deception. There are several other words that can be used to describe this behavior, including treachery, perfidy, faithlessness, infidelity, and disloyalty. Treachery implies a deliberate and calculated act of betrayal, while perfidy suggests a breach of trust or a violation of a promise. Faithlessness and infidelity refer to a lack of loyalty or allegiance, while disloyalty specifically implies a betrayal of a person or cause. These synonyms can all be used to convey the idea of traitorousness depending on the context of the situation.