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"Potential" is an adjective which is often translated as "potencial", and "feasibility" is a noun which is often translated as "la viabilidad". Learn more about the difference between "potential" and "feasibility" below.
potential(
puh
-
tehn
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shuhl
)An adjective is a word that describes a noun (e.g., the big dog).
1. (possible)
b. en potencia 
My cousin is a potential singer. I'm sure he'll be a star.Mi primo es un cantante en potencia. Estoy segura de que será una estrella.
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
2. (capacity)
a. el potencial (M)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
We want to develop each student's potential at this school.Queremos desarrollar el potencial de cada estudiante en esta escuela.
feasibility(
fi
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zih
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bih
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lih
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di
)A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
1. (general)
a. la viabilidad (F)
(f) means that a noun is feminine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
Before doing anything, you need to assess the feasibility of the project.Antes de hacer nada, hay que evaluar la viabilidad del proyecto.
b. la factibilidad (F)
(f) means that a noun is feminine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
We need to look into the feasibility of creating a website that earns us some money.Tenemos que estudiar la factibilidad de crear un sitio web que nos dé dinero.