QUICK ANSWER
"Materias primas" is a form of "materia prima", a noun which is often translated as "raw material". "Insumos" is a form of "insumo", a noun which is often translated as "supply". Learn more about the difference between "materias primas" and "insumos" below.
la materia prima(
mah
-
teh
-
ryah
pree
-
mah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. raw material
Nuestro país exporta materias primas, principalmente carbón y madera.Our country exports raw materials, especially coal and wood.
el insumo(
een
-
soo
-
moh
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
1. (finance) (Latin America)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.