There is an old boiler in this house.

Firefox is my favorite web browser.

He found an ancient fire clock.

The legend of the fire god is deeply rooted in ancient mythology.

The phoenix, also known as the fire bird, is said to burn itself out and regenerate from the ashes according to legend.

He threw a fireball using magic.

His house suddenly caught fire.

The fur of a fire rat is very valuable.

It is said that the fur of a fire-rat is resistant to fire.

St. Elmo's fire is a phenomenon of electrical discharge that appears on things like ship masts and airplane wings.