What do the following words have in common?

 

August

Health

Nebula

Nature

Culture

Snicker

Although

Clarity

Cartoon

 

HINT:

It has to do with the first two letters of each word.

 

Answer:

 

The first two letters of each word - Capital and small - are the symbols of elements:

 

Au - gold

He - helium

Ne - neon

Na - sodium

Cu - copper

Sn - tin

Al - aluminum

Cl - chlorine

Ca - calcium