Animal

Burning Rubber

Cannibus Flower

Cemetary

Diesel Exhaust

Dinasaur Breath

Dinosaur Dung

Dirt/Earth/Potting Soil

Engine Exhaust

Fart

Gas Leak

Gunpowder

Musty Basement

Ocean ( like a fishy ocean)

Rotten Fish

Skunk

Stink Bug

Stinky Cheese

Sulfurous Volcano