snitch vs tell on

snitch

• To inform on, especially in betrayal of others. 

• To contact or cooperate with the police for any reason. 

• A ball used in the sport of Quidditch. 

• A thief. 

• An informer, one who betrays his group. 

• A nose. 

• A tiny morsel. 

tell on

• To inform on, to rat out; to tell a person in authority that someone else has done something wrong. 

• To cause visible strain to.