farewell vs sendoff

farewell

• A wish of happiness or safety at parting, especially a permanent departure 

• A departure; the act of leaving 

• Goodbye. 

• To bid farewell or say goodbye. 

• Parting, valedictory, final. 

sendoff

• A party for a person (i.e. a fellow employee) who is leaving; a farewell party. 

• A party to recognize the passing (death) of a friend and allow survivors to reminisce about the person's life.