The backward counting of numbers is called a countdown.

Something which has low intensity or effect is called low-key.

When something is very energetic in its process is called dynamic.

A special force that pulls everything down to Earth.

A special room in a palace or official residence is called a chamber.

A close association with something is an affiliation.

Something that is hard to understand is intangible.

A person or group who benefits financially from a dead person. 

A system of writing for visually impaired people. 

The opinion of someone who seems against religious thought is sometimes called heresy.