Causative
Part of speech: adjective
Definition: Acting as a cause.
Part of speech: noun
Definition: An expression of an agent causing or forcing a patient to perform an action (or to be in a certain condition).
Conducive
Part of speech: adjective
Definition: Tending to contribute to, encourage, or bring about some result.
Example sentence: New developments in weapon systems during the 1950s and early 1960s created a situation that was most dangerous, and even conducive to accidental war.