Warner

/ˈwɔːrnər/

Synonyms

  • alert
  • admonisher
  • cautioner
  • forewarned

Slang Meanings

A person who often warns others unnecessarily.
Don't be such a warner; not every situation is a disaster!
Somebody seen as overly cautious or paranoid.
She’s a total warner; she thinks you'll catch a cold just from standing near the door.