informant

1. A person who supplies information (synset 110225604)
   is a type of: communicator - a person who communicates with others
   subtypes:

   • betrayer, blabber, informer, rat, squealer - one who reveals confidential information in return for money
   • leaker - a surreptitious informant
   • passive source - an informant who is not assigned to obtain specific intelligence but who routinely passes on whatever information he or she has
   • whistle blower, whistle-blower, whistleblower - an informant who exposes wrongdoing within an organization in the hope of stopping it
   same as: source
2. Someone who sees an event and reports what happened (synset 110805709)
   is a type of:

   • beholder, observer, perceiver, percipient - a person who becomes aware (of things or events) through the senses
   • speaker, talker, utterer, verbaliser, verbalizer - someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)
   subtypes:

   • attestant, attester - someone who affirms or vouches for the correctness or truth or genuineness of something
   • deponent, deposer, testifier - a person who testifies or gives a deposition
   same as: witness, witnesser

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