vs 

QUICK ANSWER
"Sea" is a form of "sea", a phrase which is often translated as "be". "Era" is a form of "era", a noun which is often translated as "era". Learn more about the difference between "sea" and "era" below.
sea
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
1.
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
(formal)
(imperative; second person singular)
a. be
Sea cuidadoso con esas copas; son frágiles.Be careful with those glasses; they're fragile.
a. to be
Mi madre quiere que sea más paciente.My mother wants me to be more patient.
3.
A word or phrase used to refer to the second person formal “usted” by their conjugation or implied context (e.g., usted).
(formal)
(subjunctive; second person singular)
a. to be
Es importante que sea amable con sus vecinos.It's important for you to be kind to your neighbors.
a. to be
Ana María le pidió a su hermana que sea su dama de honor en la boda.Ana Maria asked her sister to be her bridesmaid in her wedding.
Copyright © 2025 Dictionary Media Group, Inc.
la era(
eh
-
rah
)
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
feminine noun
a. era
La revolución pacífica de 1989 parecía el comienzo de una nueva era.The peaceful revolution of 1989 seemed the dawn of a new era.
b. age
Con el cabo de la Segunda Guerra Mundial, entramos a una nueva era. With the end of the Second World War, we entered a new age.
a. threshing floor
Limpió la era y llevó el grano al granero.He cleaned up the threshing floor and took the grain into the barn.
Copyright © 2025 Dictionary Media Group, Inc.