Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun sourdough

2 senses of sourdough

Sense 1
sourdough -- (a leaven of dough in which fermentation is active; used by pioneers for making bread)
       => leaven, leavening -- (a substance used to produce fermentation in dough or a liquid)

Sense 2
sourdough -- (a settler or prospector (especially in western United States or northwest Canada and Alaska))
       => settler, colonist -- (a person who settles in a new colony or moves into new country)
       => prospector -- (someone who explores an area for mineral deposits)