Chimney and Hob

Chimney noun - A vertical flue that provides a path through which smoke from a fire is carried away through the wall or roof of a building.

Hob and chimney are semantically related In some cases you can use "Hob" instead a noun "Chimney".

Hob noun - Playful, reckless behavior that is not intended to cause serious harm.

Chimney and hob are semantically related in hearth for burning wood topic. Sometimes you can use "Chimney" instead a noun "Hob".