vs
QUICK ANSWER
"Mostaza" is a noun which is often translated as "mustard", and "pimienta" is a noun which is often translated as "pepper". Learn more about the difference between "mostaza" and "pimienta" below.
la mostaza()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (culinary)
a. mustard
No puedo comer una hamburguesa sin catsup y mostaza.I can't eat a hamburger without ketchup and mustard.
la pimienta()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
2. (botany)
a. pepper plant
Tengo dos pimientas diferentes en mi jardín: jalapeño y cayena.I have two different pepper plants in my garden: jalapeño and cayenne.