sourdough vs prospector

sourdough and prospector both are nouns.

Word	Noun	Adjective	Verb	Adverb
sourdough	Yes	No	No	No
prospector	Yes	No	No	No

As nouns, prospector is a hypernym of sourdough; that is, prospector is a word with a broader meaning than sourdough:

sourdough: a settler or prospector (especially in western United States or northwest Canada and Alaska)
prospector: someone who explores an area for mineral deposits

Other hypernyms of sourdough include colonist, settler.

sourdough (noun)	prospector (noun)
a settler or prospector (especially in western United States or northwest Canada and Alaska)	someone who explores an area for mineral deposits
a leaven of dough in which fermentation is active; used by pioneers for making bread