Source and Whistle-blower

Source noun - A point or place at which something is invented or provided.

Whistle-blower and source are semantically related In some cases you can use "Whistle-blower" instead a noun "Source".

Whistle-blower noun - An informant who exposes wrongdoing within an organization in the hope of stopping it.

Source and whistle-blower are semantically related in sneak topic. Sometimes you can use "Source" instead a noun phrase "Whistle-blower", if it concerns topics such as informer, informer to police.