yeastless

As adjectives the difference between feastless and yeastless

is that feastless is without a feast while yeastless is without yeast.

As a noun yeast

is an often humid, yellowish froth produced by fermenting malt worts, and used to brew beer, leaven bread, and also used in certain medicines.

As a verb yeast

is to ferment.

As an adjective yeastless is

without yeast.