"Prospect" as a concept:
* Opportunity: This is a good general replacement if "prospect" refers to a potential chance for success or advancement.
* Possibility: This emphasizes the potential for something to happen.
* Hope: This suggests a positive outlook on the future.
* Potential: This highlights the inherent capacity for development or growth.
"Prospect" as a person:
* Client: This is specific to a person who is a potential customer or buyer.
* Candidate: This is specific to a person who is applying for a job or position.
* Applicant: Similar to "candidate," this refers to someone who is applying for something.
"Prospect" as a physical thing:
* Land: This is a common use if "prospect" refers to a potential mining site or area for development.
* Resource: This can refer to a potential source of something valuable, like oil or minerals.
* Deposit: This specifically refers to a place where valuable resources are found.
Ultimately, the best concrete noun to use will depend on the specific context and meaning of "prospect" in the sentence.