Final answer:
The term that has the same meaning as "vertical prototype" is Proof-of-concept.
Step-by-step explanation:
The term that has the same meaning as "vertical prototype" is Proof-of-concept. A proof-of-concept is a prototype or model that is built to test design decisions and identify potential problems. It provides additional understanding of the design and its performance, and can be implemented for a small portion of the design or comprehensively for the entire design.