I ordered two Welsh rarebits for breakfast.

Finding a rareish gemstone is always exciting.

The air in the high altitude is rarefactive.

I ordered a delicious buck rarebit for breakfast.

The air in the high altitude is rarefiable.

I found some delicious rareripes at the farmer's market.

The farmer harvested a rareripe peach from his orchard.

I planted a rareripe in my garden and it's already starting to bear fruit.

The rarefaction of air in the chamber caused the balloon to expand.

The rarefactional process caused the air to become less dense.