vs
QUICK ANSWER
"Viñas" is a noun which is often translated as "vineyard", and "viñedo" is a noun which is also often translated as "vineyard". Learn more about the difference between "viñas" and "viñedo" below.
la viña()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
el viñedo()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).