Dastardy refers to behavior that is cowardly, treacherous, or dishonorable. There are a number of synonyms for this word that can be used to describe someone who behaves in this way. Some of the most common alternatives to dastardy include cravenness, perfidy, and ignominy. Other synonyms for this word might include disloyalty, deceitfulness, or spinelessness. Regardless of the specific synonym used to describe this type of behavior, it is always important to remember that it is a negative trait that should be avoided whenever possible. By striving to act with courage and honor at all times, individuals can help to create a better world for themselves and those around them.