QUICK ANSWER
"Diente" is a form of "diente", a noun which is often translated as "tooth". "Cara" is a form of "cara", a noun which is often translated as "face". Learn more about the difference between "diente" and "cara" below.
el diente(
dyehn
-
teh
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
la cara(
kah
-
rah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (body part)
a. face
Le acarició la cara dulcemente para despertarla.He caressed her face sweetly to wake her up.
2. (position)
3. (appearance)
a. look
No pongas esa cara después de toda la suerte que has tenido.Don't give me that look after all the luck you've had.
El pasajero tiene mala cara.The passenger doesn't look well.
