worrier
nounUK /ˈwʌriə/
US /ˈwɜːriər/
A worrier is someone who worries a lot about things.
My little brother is a worrier who checks the door three times before bed.
OTHER MEANINGS
2. A person who keeps thinking about problems that might happen.
She is a worrier, always imagining the worst.
3. Someone who makes other people feel uneasy or bothered.
The loud dog was a worrier to the sheep.
4. A person who bites or shakes something repeatedly out of nervousness.
He is a worrier of his pen cap during exams.