[61]. The following nouns have one meaning in the Singular, and another in the Plural:—
| SINGULAR. | PLURAL. |
| aedēs, temple; | aedēs, house. |
| auxilium, help; | auxilia, auxiliary troops. |
| carcer, prison; | carcerēs, stalls for racing-chariot. |
| castrum, fort; | castra, camp. |
| cōpia, abundance; | cōpiae, troops, resources. |
| fīnis, end; | fīnēs, borders, territory. |
| fortūna, fortune; | fortūnae, possessions, wealth. |
| grātia, favor, gratitude; | grātiae, thanks. |
| impedīmentum, hindrance; | impedīmenta, baggage. |
| littera, letter (of the alphabet); | litterae, epistle; literature. |
| mōs, habit, custom; | mōrēs, character. |
| opera, help, service; | operae, laborers. |
| (ops) opis, help; | opēs, resources. |
| pars, part; | partēs, party; rôle. |
| sāl, salt; | sălēs, wit. |
B. ADJECTIVES.
[62]. Adjectives denote quality. They are declined like nouns, and fall into two classes,—
1. Adjectives of the First and Second Declensions.
2. Adjectives of the Third Declension.
ADJECTIVES OF THE FIRST AND SECOND DECLENSIONS.
[63]. In these the Masculine is declined like hortus, puer, or ager, the Feminine like porta, and the Neuter like bellum. Thus, Masculine like hortus:—