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"Amistad" is a form of "amistad", a noun which is often translated as "friendship". "Amor" is a noun which is often translated as "love". Learn more about the difference between "amor" and "amistad" below.
el amor()
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
la amistad()
A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. friendship
Nuestra amistad ha sido fuerte y duradera.Our friendship has been strong and lasting.
No vamos a dejar que esta pelea arruine una amistad de años.We're not going to let this fight ruin a friendship that has lasted for years.
las amistades
A plural noun indicates that there is more than one person, place, thing, or idea.