Difference between Kudos and Congratulations

Kudos

Part of speech: noun

Definition: Praise; accolades. Praise; accolades.

Congratulations

Part of speech: interjection

Definition: Expressing approbation (see also congrats)

Part of speech: noun

Definition: The act of congratulating.

Example sentence: I called up and said, 'Dad, I won a MacArthur.' My father goes: 'I always thought your sister would win that,' and I said, 'Dad, just say congratulations and keep your private thoughts private.' At that point he laughed, then burst into tears, and it was obvious that he was so happy and proud.