Scaremonger

He was a scaremonger, always trying to make people worry.

You're a silly scaremonger, spreading a yarn like this, and a cur to boot for deserting your partner!

I have refrained from giving actual names and dates, for obvious reasons, and have therefore been compelled, even at the risk of being again denounced as a scaremonger, to present the facts in the form of fiction—fiction which, I trust, will point its own patriotic moral.

We're not scaremongering / This is really happening, happening

If no new cases come from the Buff Club exposure site, it will be hard to believe politicians scaremongering that the delta variant is so infectious that all you have to do is walk past an infected person to get it.