cópia (nom. sing.)

cópiae (gen. sing.)

feminine

cúra (nom. sing.)

cúrae (gen. sing.)

feminine

fília (nom. sing.)

fíliae (gen. sing.)

feminine

fórma (nom. sing.)

fórmae (gen. sing.)

feminine

hóra (nom. sing.)

hórae (gen. sing.)

feminine

iniúria (nom. sing.)

iniúriae (gen. sing.)

feminine

littera (nom. sing.)

litterae (gen. sing.)

written in the plural, translated in singular

feminine

letter (of the alphabet)
pl. a letter (epistle)

letters is adj. is plural

memoria (nom. sing.)

memoriae (gen. sing.)

feminine

nauta (nom. sing.)

nautae (gen. sing.)

masculine

pecúnia (nom. sing.)

pecúniae (gen. sing.)

feminine

poena (nom. sing.)

poenae (gen. sing.)

feminine

praeda (nom. sing.)

praedae (gen. sing.)

feminine

próvincia (nom. sing.)

próvinciae (gen. sing.)

feminine

pugna (nom. sing.)

pugnae (gen. sing.)

feminine

régína (nom. sing.)

régínae (gen. sing.)

feminine

unda (nom. sing.)

undae (gen. sing.)

feminine

victória (nom. sing.)

victóriae (gen. sing.)

feminine

amícus (nom. sing.)

amící (gen. sing.)

masculine

cibus (nom. sing.)

cibí (gen. sing.)

masculine

numerus (nom. sing.)

numerí (gen. sing.)

masculine