Cain and Rat

Cain noun - (Old Testament) Cain and Abel were the first children of Adam and Eve born after the Fall of Man; Cain killed Abel out of jealousy and was exiled by God.

Rat and Cain are semantically related. In some cases you can use "Rat" instead a noun "Cain".

Rat noun - A person who provides information about another's wrongdoing.

Cain and rat are semantically related. Sometimes you can replace term "Cain" with "Rat", this nouns are similar.