prospect vs promise

prospect and promise both are nouns.

Word	Noun	Adjective	Verb	Adverb
prospect	Yes	No	Yes	No
promise	Yes	No	Yes	No

As nouns, promise is a hyponym of prospect; that is, promise is a word with a more specific, narrower meaning than prospect:

Other hyponyms of prospect include hope, foretaste, possibility, anticipation, expectancy, apprehension, misgiving.

prospect (noun)	promise (noun)
a prediction of the course of a disease	grounds for feeling hopeful about the future
the visual percept of a region	a verbal commitment by one person to another agreeing to do (or not to do) something in the future
belief about (or mental picture of) the future
someone who is considered for something (for an office or prize or honor etc.)
the possibility of future success

prospect (verb)	promise (verb)
explore for useful or valuable things or substances, such as minerals	make a promise or commitment
search for something desirable	promise to undertake or give
	make a prediction about; tell in advance
	give grounds for expectations