Singular
El hombre (the man)
La mujer (the woman)
La mesa (the table)
El libro (the book)
El león (the lion)
La leona (the lioness)
Plural
Los hombres (the men)
Las mujeres (the women)
Las mesas (the tables)
Los libros (the books)
Los leones (the lions)
Las leonas (the lionesses)