Atoms On Earth
There are quite a lot of atoms that make up the world, but not as many as you might think. In fact, there are fewer atoms on Earth right now than there are ways to shuffle a deck of cards. There are 80,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 (67 zeros) ways to shuffle a standard 52 deck.
Gnurr
Aren't you ever surprised by the gunk found in the bottom of your pockets? Shockingly, that lint has a name, and it's called gnurr. The exact description is "what collects over time in the bottoms of pockets or cuffs of trousers." It's not a word you'll need to use a lot, but it's a pretty rare vocabulary word.